Higgs Boson Production in Association with Three Jets
关于霍金的英文简介
关于霍金的英文简介斯蒂芬·威廉·霍金,英国剑桥大学著名物理学家，是现代最伟大的物理学家之一，也是20世纪享有国际盛誉的伟人之一，下面是小编为你整理的关于霍金的英文简介，希望对你有用!斯蒂芬·威廉·霍金学术思想Time MachineBritish famous astrophysicist Stephen William Hawking following the recognition of the existence of aliens, but also issued a stunning discussion: he claimed that with the human flying into the future of the time machine, theoretically feasible, the required conditions include space In the wormhole or speed close to the speed of light of the spacecraft. However, Hawking also warned not to take time to go back to history, because "only crazy scientists, will want to go back to the past 'upside down causal'.Physicist Hawking, in a documentary about the universe, notes that mankind can build a spacecraft close to the speed of light and be able to enter the future. Hawking even said that he was worried about others as a "weirdo", so he did not dare to speak, do not want to talk about the time machine things, until the documentary after the generous discussion.Time gapAs for the key point of time machine, Hawking stressed that the so-called "four degrees of space", scientists named "wormhole." Hawking stressed that "wormhole" in our surroundings, but small to the naked eye can not see, they exist in space and time cracks.He pointed out that the universe is not flat or solid, close to the observation will find all objects will appear small holes or wrinkles, which is the basic physical law, and apply to time. Time also has subtle cracks, wrinkles and voids, than the molecules, atoms also small space is named "quantum bubble", "wormhole" exists in them.return to the pastHawking pointed out that the theory of time tunnel or "wormhole" can not only carry humans to other planets, if the wormhole at both ends of the same location, and time rather than distance, then the spacecraft can fly into, after flying still Close to the earth, just into the so-called "distant past". Because in the 4-degree space, 10 minutes may be n hours. But Hawking warned, do not take time to go back to history.Fly to the futureSteven William Hawking said that if scientists can build a spacecraft close to the speed of light, then the spacecraftwill inevitably because it can not violate the speed of light is the maximum speed limit law, resulting in the cabin time slows down, then the flight is equal to a week 100 years on the ground, it is equivalent to fly into the future.Hawking lift artificial satellite, for example, refers to the satellite in orbit, due to the impact of the Earth's gravity is small, the satellite time is slightly faster than the ground time. As a result, Hawking envisioned a large speed universe ship, can be accelerated in 1 second to 97,000 km per hour, 6 years to accelerate to 99.99% of the speed of light, faster than the history of the fastest ship Apollo 10 times. The passengers on board the ship is disguised to the future, making a real time travel.Four degrees of spaceEven in space, everything has a length of time, in time roaming, means through the "4 degrees space."Hawking, for example, pointed out that driving straight line is equal to the "1 degree space" in the road, and turn left or right is equal to plus "2 degrees space", as in the meandering mountain road up and down, it is equivalent to enter the "3 degree space " Crossing the time tunnel is to enter the "4 degrees space."Alien theoryStephen Hawking in the United States to explore the channel April 25, 20xx broadcast documentary "follow Stephen Hawking into the universe," said that the possibility of alien existence is great, but humans should not take the initiative to find them, make every effort Avoid contact with them.Hawking believes that, in view of the alien may be looted the Earth's resources and then sped away, the human initiative to seek contact with them "some too risky." "If the aliens visited us, I thought the results could be similar to that of Christopher Columbus in the American continent, which was not a good thing for the local Indians.However, there are many experts on the "alien threat theory" expressed doubts. They from the alien's wisdom and technology, and even human self-alien psychological role to illustrate the alien people do not pose a threat to the earth. Chinese linguist and mathematician Zhou Haizhong said that if aliens can come to Earth, that their civilization is far more than our human; the higher the degree of civilization, the lower the possibility of violent tendencies. He believes that the threat of aliens is completely unnecessary, because as long as the wisdom of life, their rationality determines how they treatother intelligent life; aliens and the future of the earth is able to peaceful coexistence, friendly cooperation And common development. Coincidentally, American astronomer David Morrison also said that if a civilization can exist for hundreds of thousands of years, then it must be more advanced than human. This civilization will certainly solve a series of problems we face, so there is no need to invade the earth. He even believes that aliens are "peace messengers" and are friendly and cute, and said humorously, "If the aliens visit, I will treat them well." Nobel Prize in physics, the American astrophysicist George Mute eyes, "alien threat theory" all the worries are unfounded.Interstellar immigrationHawking in August 20xx to accept the US intellectual video sharing site BigThink interview, and then exposing remarks, said the Earth will be destroyed within 200 years, and human beings want to continue to survive only one way: immigration planets.Hawking said that if humans want to continue, they must immigrate to Mars or other planets, and the Earth will sooner or later die. Hawking said: "Human beings have entered an increasingly dangerous period, we have experienced a number ofevents related to life and death.As the human gene carried by the 'selfish, greedy' genetic code, humans are a little bit of plunder of the earth resources, Humans can not put all the eggs in a basket, so they can not put a bet on a planet.Academic betsHawking liked some scientific propositions, gambling with other scholars, and sometimes became a scientific scholar.1. Can you find the Higgs boson?Hawking made a bet with Professor Gordon of the University of Michigan: CERN would not find the Higgs boson.Higgs boson is the famous British physicist Higgs and other colleagues after a long period of painstaking research, waiting for 48 years, only to find the Higgs boson, also known as "God particles."2. Does the black hole exist?Set of energy to study the black hole of Hawking, had worried that the black hole may be just a theoretical concept, and the reality does not exist. He became nothing when he was free, and in 1975 he was gambling with another physicist, Kip Thorne, whether the black hole existed.The presence of naked singularityIn 1991, Hawking also asked to open the gambling, the Thornand his standing in the same front, the bet on the side of the physicist Pei Shiji (John Preskill). The proposition at that time was whether the singularity should be surrounded by a black hole, but whether there was a "naked singularities" surrounded by a black hole.Hawking and Thorne bet: the naked spot does not exist, then with the Berez set the gambling, who lost to the other side to send a used to "cover nudity" T-shirts, write the appropriate clothes to lose words. Hawking amended his theory in 1997, pointing out that naked singularity may exist.High dimensional spaceAccording to the M theory proposed in the 1990s (a kind of superstring theory), the universe is eleven dimensions, composed of the plane of vibration. In Einstein, the universe is only four-dimensional (three-dimensional space andone-dimensional time), modern physics is that there are seven-dimensional space we can not see.How does the scientist explain the difference between what we have known and what may exist but not perceived? They make an analogy: an ant travels on a piece of paper, Or left, forward or backward. It is high and low meaningless, that is to say, the third dimension of the space is there, not known by the ants.Likewise, our world is made up of four-dimensional data (three spatial dimensions, one time dimension), and we are not aware of all other dimensions.According to the physicist's view there should be seven dimensions. Despite having so many dimensions, these dimensions are invisible, and they themselves are rolled together, known as compressed dimensions. In order to clarify this view, let us to ants as an example to start our imagination. We can imagine, the ants in the above walking paper roll up, until rolled into a cylindrical. If the ants walk along the paper wall, and finally it will return to the starting point, which is an example of compressed dimension. If you can take along the famous Mobius, the above phenomenon will occur, of course, it is three-dimensional, but if you walk along it, will always return to the starting point. Mobius is compressed from the perspective of the dimension, according to the physics it has three dimensions, but who walking in the above, can only be recognized as a dimension. This is a bit like the people on the left: up or down, but never come to an end. If the ant is not walking along the curved wall of the paper tube, it will never return to the original starting point. This is an example of two dimensions (or the kind of dimension we are perceived),and it is impossible to return to the original starting point along it.斯蒂芬·威廉·霍金主要成就Stephen William Hawking's research laid the groundwork for today's understanding of the black hole and the origin of the universe, but according to himself, he said that he was in the animated "The Simpsons" and the science fiction episode "Star Trek: Next Generation" (Star Trek: The Next Generation) is also wonderful.Hawking emphasizes that the universe does not need a Creator or "God" in the "Great Design", "philosophy is dead", which means that mankind will be detached from ignorantself-slavery, denying that pure philosophy and religion can really explain Naturally, it also shows that the major religions are only the ancient spiritual world to explore the unknown, the pursuit of immortal system, rather than the objective truth. With the progress of the times, human civilization is also catch up, not far behind, which is why generations of people of insight to the existence of life and the meaning of the universe. To solve these propositions should have been the task of the philosopher, but unfortunately the highly developed science makes the philosophy can not keep up. Hawking in the "big design" of the opening that "philosophy isdead" is the meaning.Hawking hopes to solve the mystery of the birth of the universe, the 1970s, Hawking quantum mechanics applied to explain the phenomenon of black hole, in the next 30 years, with quantum mechanics to explain the universe has become more difficult. Hawking wanted to find a set of theories that could explain the universe as a whole to illustrate the birth of the 13.7 billion years of the universe until now, but it has not been concluded for years even if it is infinitely close. According to his theory of quantum mechanics, the birth of the universe is the big bang produced, which is a compressed infinitely small but with large gravity of the material (also can be understood as the density of infinite) explosion products. The theoretical category of quantum mechanics can not explain how this process is going to be done. Why is it so? Hawking says "that must have a theory that can describe small-scale gravity."The latest scientific breakthrough is Hawking's colleague, Michael Smith of London's Queen Mary's College (Michael. Green) involved in the construction of the superstring theory, referred to as "string theory", which states that all particles and natural forces are actually in shock In the universe likea small object, to solve the Hawking has always wanted to try to answer the gravity problem, this theory must be established in the universe must have 9,10 or even greater than 11 dimensions, and human beings in the three-dimensional world may only One of the real ones of the universe ...A large number of scientists around the world are doing experiments in space and earth to prove string theory and from experiments to support Hawking's black hole theory and quantum theory. January 24, 20xx, the famous British scientist Professor Stephen Hawking once again with its blackhole-related theory shocked the physics, in a recently published paper admitted that "black hole does not exist," but "gray hole" indeed exist. In a paper entitled "Information Preservation and Weather Forecasting For Black Holes", Hawking points out that "black holes do not exist" because they can not find the boundaries of black holes. In order to solve the "firewall" problem in the new theory set "black hole does not exist", it does not really do not exist. The black hole of the boundary, also known as the "horizon", the classic black hole theory that the black hole outside the material and radiation can enter the black hole through the horizon, and any material and radiation within the black hole can not wear out horizons.Hawking's latest "gray hole" theory that material and energy in the black hole trapped after a period of time, will be re-released into the universe. He admitted in his essay that his initial knowledge of the horizon was flawed, and that light could cross the horizon. When the light flies the black hole core, its movement is like a person running on a treadmill, slowly through the outward radiation and shrink. "The classical black hole theory argues that any matter and radiation can not escape the black hole, and quantum mechanics suggests that energy and information can escape from the black hole." Hawking also pointed out that the interpretation of this escape process requires a gravity And other basic forces of successful integration of the theory. In the past hundred years, no one in physics has tried to explain this process.For Hawking's "gray hole" theory, some scientists expressed approval, it was skeptical. Joseph Polchinski, a theoretical physicist at the Cuban Institute of Theoretical Physics, points out that according to Einstein's theory of gravity, the boundary of the black hole is present, but it differs from the rest of the universe Not obvious. In fact, as early as 20xx, Hawking had made a similar statement. On July 21 of that year, Hawking pointed out at the 17th InternationalSymposium on General Theory of Relativity and Gravitation that the Black Hole was not "completely swallowed" around it, as he and most other physicists had previously thought, Some of the information that is sucked into the depths of the black hole may be released at some point.In 1973, Hawking said he calculated by the conclusion that the black hole in the formation of the process of its quality reduction, but also continue to be in the form of energy to the outside world radiation. This is the famous Hawking radiation theory, the theory mentioned in the black hole radiation does not include the black hole inside the material of any information, once the black hole is concentrated and evaporated disappear, all of which information will disappear, which is the so-called The "black hole paradox". This theory and quantum mechanics of the relevant theories appear contradictory. Because modern quantum physics finds that this material information is never completely gone.For more than 30 years, Hawking tried to explain this contradictory view with various speculations. Hawking has said that the quantum movement of the black hole is a special case, because the gravity in the black hole is very strong, quantum mechanics at this time is no longer applicable. Hawking'sargument does not convince the scientific community of skeptical scholars. It now appears that Hawking finally gave this year's contradictory view of a more convincing answer. Hawking said the black hole never completely shut itself - Hawking radiation, they in a long period of time gradually to the outside world to radiate more and more heat, then the black hole will eventually open themselves and release the material contained in the information.On August 16, 1616, Jeff Steinhauer, a professor at the Israel Institute of Technology in Haifa, proved the quantum effect of Hawking radiation in a paper published in the journal Nature Physics. He made a sound black hole instead of a light black hole, using a long tube with sound particles, the phonon "horizon". In 20xx, Professor Steinhall found that the phonemes were randomly generated in the horizon. In his latest results, Steinhouse proved that these phonons were one of a pair of related phonons, thus proving the quantum effect of Hawking radiation.---来源网络整理，仅供参考。
希格斯玻色子 考研英语
希格斯玻色子考研英语In the realm of particle physics, the Higgs boson stands as a pivotal element in the Standard Model, which serves as the most widely accepted framework for understanding the fundamental particles and forces that shape our universe. The discovery of the Higgs boson at CERN's Large Hadron Collider (LHC) in 2012 was a monumental milestone, confirming the existence of the last predicted particle in the Standard Model and providing crucial insights into the mechanism that gives particles their mass.The Higgs boson, often referred to as the "God particle," is unique because it is associated with the Higgs field, an energy field that permeates the entire universe. According to the theory proposed by Peter Higgs and others in the 1960s, particles acquire mass by interacting with this field. The more strongly a particle interacts with the Higgs field, the heavier it becomes. Conversely, particles that do not interact with the Higgs field remain massless, such as photons, the particles of light.Understanding the Higgs boson is not only a matter of scientific curiosity but also has profound implications for our comprehension of the universe. For instance, without the Higgs mechanism, atoms would not exist, as the elementary particles they are made of would zip around at the speed of light without ever coming together to form atoms. The Higgs field is thus essential for the formation of complex structures, including stars, planets, and ultimately life itself.The search for the Higgs boson was a decades-long quest that involved thousands of scientists and engineers from around the world. It required the construction of the LHC, the most powerful and complex machine ever built, capable of accelerating protons to near the speed of light and smashing them together at unprecedented energy levels. The detection of the Higgs boson was achieved through the observation of the particles that result from its decay, as the Higgs boson itself is highly unstable and disintegrates almost immediately after being created.The confirmation of the Higgs boson's existence has opened up new avenues of research in particle physics. Scientists are now probing the properties of the Higgs bosonwith greater precision, seeking to uncover any deviations from the Standard Model predictions that could hint at new physics beyond our current theories. Such discoveries could potentially lead to a deeper understanding of the universe's early moments and the conditions that led to the formation of matter as we know it.Moreover, the study of the Higgs boson has broader implications for fields such as cosmology and astrophysics. It plays a significant role in theories of cosmic inflation, the rapid expansion of the universe that occurred fractions of a second after the Big Bang. The Higgs field's interaction with other fields and particles during this period could have shaped the large-scale structure of the universe, influencing the distribution of galaxies and the evolution of cosmic structures.In conclusion, the Higgs boson is a cornerstone of modern physics, providing a key to unlocking the mysteries of mass and the fundamental structure of matter. Its discovery is a testament to human ingenuity and the collaborative spirit of the scientific community. As research continues, the Higgs boson will undoubtedly remain at the forefront of our quest to understand the deepest secrets of the universe.(Note: This document is a creative composition intended for educational purposes and does not contain any direct quotations or copyrighted material.)。
12年中国日报最新词汇
Intellidating，是intelligent（智慧）和dating（相亲、约会）两词的合成词，指一起听讲座、去读书会或其它文化活动，强调才华和智慧层面的约会相亲，我们称之为“智慧相亲”。
上面报道中的fake silicon bellies就是硅胶“假肚子”，这种“假肚子”和孕妇真正的“大肚子”相似度极高，由silicone gel（硅胶材料）制成。
买这种假肚子的人主要有以下几个目的：在表演时将其当做prop（道具）来increase comic effects（增加喜剧效果）、找人surrogacy（代孕）或adoption（领养孩子）时可以假装怀孕掩人耳目、买“假肚子”假装怀孕来避免layoff（裁员）等。
除了“假肚子”，硅胶还可以用来做silicone breast implants（硅胶假胸植入）来达到breast enlargement（丰胸）的效果，或做silicone butt-pad（硅胶臀垫）来丰臀，以及做fingerprint cover（指纹套）来应付企业指纹考勤等。
上面报道中的God particle就是上帝粒子，学名叫Higgs boson（希格斯玻色子），它是一种subatomic particlea （亚原子粒子），可以帮助解析为何其它粒子会有质量。
科学家们通过用Large Hadron Collider（大型强子对撞机）模拟big bang（宇宙大爆炸）来寻找“上帝粒子”，这种实验方式还可以探究dark matter（暗物质）、antimatter （反物质）、以及宇宙形成等。
Particle是粒子的意思，是指能够以自由状态存在的最小物质组分，最早发现的粒子是electron（电子）和proton （质子）。
Particle还可表示“极小量，极小的程度”等，例如：It doesn't make a particle of difference.（它不会产生任何影响）。
安徽省宿州市省、市示范高中2022-2023 学年高一下学期期中考试英语试题
安徽省宿州市省、市示范高中2022-2023 学年高一下学期期中考试英语试题1. Where is Amy now?A．In Seoul. B．In Beijing. C．In London.2. What does the man mean?A．His mother likes apple pie.B．The apple pie tastes very good.C．He’ll make apple pies for his mother.3. Why does the woman talk to David?A．To make an apology. B．To ask for a favor. C．To invite him over.4. What are the speakers talking about?A．A strong team. B．A wonderful game. C．A great sportsman.5. What will the woman do for the man?A．Teach him cleaning skills.B．Find him a new apartment.C．Help him clean his apartment.6. 听下面一段较长对话，回答以下小题。
1. Who is the woman speaking to?A．Her son. B．Her husband. C．A salesman.2. Where is the washroom?A．On the 5th floor. B．On the 4th floor. C．On the 3rd floor.7. 听下面一段较长对话，回答以下小题。
1. What does the man plan to do this afternoon?A．Go swimming. B．Go to class. C．Go to the library.2. What does Mr. Smith probably teach?A．History. B．Chemistry. C．Math.3. What does the woman offer to do for the man?A．Collect information for his paper.B．Help him with his chemistry.C．Teach him to study math.8. 听下面一段较长对话，回答以下小题。
2014年全国硕士研究生入学统一考试英语(一)试题答案及解析
2014年全国硕士研究生入学统一考试英语(一)试题解析 Section I Use of English 1、【答案】A where 【解析】本句的句义是：我们突然不能回忆起刚才把钥匙放在哪里了，或者一个老熟人的姓名，或者是一个老乐队的名称。
这根据句义，这里是表示忘记了钥匙所放在的地点，where 作为宾语从句的引导词，和后面的部分一起，作为remember的宾语，因此正确答案为A。
B、when 引导表示时间的状语从句，C、that放在这里不合适，DWhy引导表示原因的状语从句。
B、C、D均不符合题意。
2、【答案】B fades 【解析】本句的句义是：本句的句义是关于大脑的退化，我们婉转地把它称作"老年时分"(老年人的瞬间记忆丧失)。
从前文可以看出，文章讲的是随着年龄增长，记忆力的衰退。
由语境确定B。
fade away是一个固定搭配，表示消失、衰弱、消退、消歇。
A. Improve 表示提高;C. recover表示恢复、D.collapse表示崩塌。
A、C、D均不符合题意。
3、【答案】B while 【解析】本句的句义是：这看起来问题不大，但精神集中能力的丧失，对于我们的职业生涯，社会交往以及个人生活都能产生有害影响。
这个空在句首，需要填一个连接词，看起来问题不大和后面的内容之间存在转折关系，因此正确答案为B。
A选项unless表示让步关系;C选项Once作为连词表示条件关系，表示一……就;D选项也是条件关系。
A、C、D均不符合题意。
4、【答案】A damaging 【解析】本句的句义同第3题。
通过整篇文章语境，我们可以看出注意力的丧失会对我们造成不好的影响，造成损害，因此正确答案是damaging，表示损害。
B选项limited表示有限，局限性;C选项uneven表示不均匀，奇数;D选项obscure表示晦涩的不清楚的。
B、C、D均不符合题意。
5、【答案】C well-being 【解析】本句的句义同第3题。
2014年考研英语一真题答案解析（完整版）
2014年考研英语一真题答案解析（完整版）2014年全国硕士研究生入学统一考试英语(一)试题解析Section I Use of English1、【答案】A where【解析】本句的句义是：我们突然不能回忆起刚才把钥匙放在哪里了，或者一个老熟人的姓名，或者是一个老乐队的名称。
这根据句义，这里是表示忘记了钥匙所放在的地点，where 作为宾语从句的引导词，和后面的部分一起，作为remember的宾语，因此正确答案为A。
B、when 引导表示时间的状语从句，C、that放在这里不合适，DWhy引导表示原因的状语从句。
B、C、D均不符合题意。
2、【答案】B fades【解析】本句的句义是：本句的句义是关于大脑的退化，我们婉转地把它称作“老年时分”(老年人的瞬间记忆丧失)。
从前文可以看出，文章讲的是随着年龄增长，记忆力的衰退。
由语境确定B。
fade away 是一个固定搭配，表示消失、衰弱、消退、消歇。
A. Improve 表示提高;C. recover表示恢复、D.collapse表示崩塌。
A、C、D均不符合题意。
3、【答案】B while【解析】本句的句义是：这看起来问题不大，但精神集中能力的丧失，对于我们的职业生涯，社会交往以及个人生活都能产生有害影响。
这个空在句首，需要填一个连接词，看起来问题不大和后面的内容之间存在转折关系，因此正确答案为B。
A选项unless表示让步关系;C选项Once作为连词表示条件关系，表示一……就;D选项也是条件关系。
A、C、D均不符合题意。
4、【答案】A damaging【解析】本句的句义同第3题。
通过整篇文章语境，我们可以看出注意力的丧失会对我们造成不好的影响，造成损害，因此正确答案是damaging，表示损害。
B选项limited表示有限，局限性;C选项uneven表示不均匀，奇数;D选项obscure表示晦涩的不清楚的。
B、C、D均不符合题意。
5、【答案】C well-being【解析】本句的句义同第3题。
The Discovery of the Higgs Boson Particle
The Discovery of the Higgs BosonParticle在2012年，欧洲核子研究组织（CERN）宣布了一个历史性的发现——希格斯玻色子粒子被首次探测到。
这项发现被誉为物理学的里程碑，它不仅证明了物理学家的理论，也使我们的世界变得更为神秘、更具有探索的价值。
成千上万的科学家和工程师在CERN合作进行了长达数十年的研究。
他们建造了一个高峰值能量为14兆电子伏特的大型强子对撞机，这相当于每秒钟撞击7万亿个质子。
这些撞击会在实验中产生许多新粒子，包括希格斯玻色子。
希格斯玻色子是什么？希格斯玻色子是英国物理学家彼得·希格斯和罗伯特·布拉特的研究成果。
他们提出了一种理论，即所有物质都由基本粒子组成。
但是，这些基本粒子没有质量。
因此，他们认为，装满了整个宇宙的场，称为希格斯场，使一些基本粒子通过与这个场的相互作用而获取质量。
因此，希格斯玻色子是这个场的基本粒子，它是使其他粒子获得质量的介质。
但是，希格斯玻色子本身很难被探测。
实际上，科学家曾经怀疑这种粒子是否存在。
希格斯玻色子的发现在CERN，科学家们使用强子对撞机，将两束脉冲粒子加速到接近光速的速度，然后在一起碰撞。
这种方法类似于在大型碰撞实验中观察莫顿基普事件。
当两个质子相撞时，它们之间的能量可以转化成各种新的粒子。
同时，CERN科学家还使用了一个叫做ATLAS的探测器来观测希格斯玻色子的碰撞事件。
ATLAS探测器是世界上最大、最复杂的粒子探测器之一，重量达到了7000吨，高度相当于一个六层楼高的建筑。
在2012年7月，CERN宣布他们最终发现了希格斯玻色子的存在。
它们在对不同能量的对撞事件进行分析时，观察到了一个典型的信号，这个信号称为希格斯粒子的“衰变模式”。
这证实了希格斯玻色子不仅存在，而且它的质量比先前预测的更接近125吉电子伏特。
希格斯玻色子的意义希格斯玻色子的发现对于物理学的发展具有重要意义。
希格斯场理论广泛应用于物理学的各个领域，包括量子场论、宇宙学、原子物理学、核物理学以及高能物理学。
二十一世纪的新发现作文
二十一世纪的新发现作文英文回答：In the 21st century, there have been numerous groundbreaking discoveries in various fields, from science and technology to medicine and space exploration. One of the most significant discoveries is the detection of gravitational waves, which was first announced in 2016. This discovery confirmed a major prediction of Albert Einstein's general theory of relativity and opened up a new window to observe the universe.Another remarkable discovery in the 21st century is the development of CRISPR gene-editing technology. This revolutionary tool allows scientists to precisely edit DNA, leading to potential breakthroughs in treating genetic diseases and creating genetically modified organisms.Furthermore, the discovery of exoplanets outside of our solar system has expanded our understanding of the universeand the possibility of extraterrestrial life. With the advancement of telescopes and space exploration technology, astronomers have identified thousands of exoplanets, someof which may have the conditions to support life.In the field of medicine, the development of immunotherapy has transformed cancer treatment byharnessing the body's immune system to target and destroy cancer cells. This has led to significant improvements inthe survival rates of patients with certain types of cancer.In addition, the discovery of the Higgs boson particleat the Large Hadron Collider in 2012 provided crucial evidence for the mechanism of mass generation in the universe, as proposed by the Standard Model of particle physics.These discoveries have not only advanced human knowledge and understanding of the world around us, butthey have also opened up new possibilities for scientific and technological advancements in the future.中文回答：在21世纪，各个领域都取得了许多突破性的发现，从科学技术到医学和太空探索。
新世纪科学奇迹作文英语
新世纪科学奇迹作文英语In the 21st century, there have been incredible scientific miracles that have changed the way we live. For example, the development of CRISPR technology allows scientists to edit genes with unprecedented precision, opening up new possibilities for treating genetic diseases.The discovery of gravitational waves by the LIGO experiment in 2015 confirmed a major prediction of Albert Einstein's general theory of relativity, and opened a new window to the universe. This breakthrough hasrevolutionized our understanding of the cosmos and the nature of gravity.Advancements in artificial intelligence have led to the creation of self-driving cars, which have the potential to revolutionize transportation and make roads safer. These cars use a combination of sensors and algorithms to navigate the world, and have the potential to reduce accidents caused by human error.The development of 3D printing technology has allowed for the creation of complex and customized objects, from prosthetic limbs to architectural models. This technology has the potential to revolutionize manufacturing and make it more accessible to individuals and small businesses.The discovery of the Higgs boson particle at the Large Hadron Collider in 2012 confirmed the existence of the Higgs field, which gives particles mass. This discovery has deepened our understanding of the fundamental forces and particles that make up the universe.In conclusion, the 21st century has seen remarkable scientific achievements that have the potential to revolutionize our world. From gene editing to gravitational waves, these breakthroughs have expanded our understanding of the universe and opened up new possibilities for the future.。
自然科学对话英语作文
自然科学对话英语作文标题，A Dialogue on Natural Science。
自然科学对话。
---。
Introduction。
Natural science plays a crucial role in understanding the world around us. Through observation, experimentation, and analysis, scientists uncover the mysteries of nature and contribute to the advancement of human knowledge. In this dialogue, two students, Alex and Sarah, engage in a conversation about various aspects of natural science, including biology, physics, and environmental science.---。
Alex: Hey, Sarah! Have you ever wondered how plantsconvert sunlight into energy?Sarah: Yeah, it's fascinating! They use a processcalled photosynthesis, where they absorb sunlight through chlorophyll and convert it into glucose and oxygen.Alex: Exactly! And did you know that photosynthesis not only produces food for plants but also generates the oxygen we breathe?Sarah: Wow, nature is truly amazing! Speaking of which, have you heard about the discovery of the Higgs boson particle in physics?Alex: Yeah, it's a groundbreaking achievement! The Higgs boson is often referred to as the "God particle" because it gives mass to other particles through the Higgs field.Sarah: I find quantum physics so intriguing. The idea that particles can exist in multiple states simultaneously challenges our understanding of reality.Alex: Definitely! Quantum mechanics opens up a whole new realm of possibilities and has practical applications in various fields, such as computing and cryptography.Sarah: Switching gears a bit, let's talk about environmental science. Climate change is a pressing issue facing our planet today.Alex: Absolutely. Human activities, such as burning fossil fuels and deforestation, release greenhouse gases into the atmosphere, leading to global warming and unpredictable weather patterns.Sarah: It's alarming to see the impact of climate change on ecosystems and biodiversity. We need to take action to reduce our carbon footprint and protect the environment for future generations.Alex: Agreed. Sustainable practices, renewable energy sources, and conservation efforts are essential steps toward mitigating the effects of climate change andpreserving Earth's natural resources.Sarah: I'm glad to see more people becoming aware of these issues and advocating for positive change. Education and awareness are key to addressing environmental challenges.Alex: Absolutely. By working together and implementing effective solutions, we can create a healthier and more sustainable planet for all living beings.---。
智慧藏在细节里作文900字记叙文
智慧藏在细节里作文900字记叙文英文回答：Wisdom lies concealed within the subtle details, a profound truth that has been recognized by philosophers and scholars alike throughout history. As the ancient Chinese proverb aptly states, "The devil is in the details." This adage serves as a constant reminder that even the most seemingly insignificant aspects of a situation or matter can hold great significance and reveal hidden insights.Attention to detail is a hallmark of wisdom, for it allows us to perceive the nuances and complexities that often escape the untrained eye. By meticulously observing and analyzing the minutiae, we can uncover patterns, connections, and relationships that would otherwise remain hidden. This heightened level of awareness enables us to make more informed decisions, solve problems more effectively, and better understand the world around us.The renowned Japanese concept of "kanban," which translates to "signboard" or "visual card," exemplifies the power of detail-oriented thinking in action. Kanban is a lean manufacturing technique that involves using visual cues, such as cards or electronic displays, to track the progress of work in real time. By paying close attention to the details of the production process, such as the number of items in progress, the lead time, and potential bottlenecks, managers can identify areas for improvement and optimize efficiency.In the realm of scientific research, the importance of meticulous observation and data analysis cannot be overstated. Breakthroughs often occur when scientists stumble upon unexpected or seemingly anomalous data points. By carefully examining these details and seeking to explain their implications, researchers can gain new insights and advance our understanding of the natural world. The discovery of the Higgs boson, a fundamental particle that plays a crucial role in the Standard Model of physics, is a testament to the profound impact of attention to detail in scientific inquiry.Furthermore, in the field of education, the ability to identify and interpret subtle cues is essential foreffective teaching and learning. By observing the nonverbal cues, facial expressions, and body language of students, teachers can gain insights into their understanding, engagement, and emotional state. This information enables them to adjust their teaching methods and provide personalized support to each student, thereby maximizingthe effectiveness of the learning process.In conclusion, wisdom lies concealed within the details. By cultivating an unwavering attention to detail, we can uncover hidden insights, make informed decisions, solve problems more effectively, and better understand the world around us. The pursuit of wisdom demands a relentless curiosity, a willingness to observe and analyze, and an appreciation for the significance of even the mostseemingly insignificant aspects of our experiences.中文回答：慧藏于细微之处，此乃哲人学者历来公认之至理。
你还记得你在干什么吗,英语作文
Title: A Moment in Time: Remembering When the Higgs Boson Was DiscoveredIn the tapestry of life's events, there are moments that etch themselves into our memories, becoming indelible markers of time. For me, one such moment stands out vividly: the announcement of the discovery of the Higgs boson particle in 2012. As a keen follower of scientific advancements, this announcement not only marked a significant milestone in the field of physics but also triggered a surge of excitement and curiosity within me.It was a typical weekday evening, and I found myself nestled comfortably on the couch in my living room, surrounded by books and a few scattered notebooks filled with scribbles of equations and theories. I had just finished a long day of studying for my physics exams, my mind buzzing with the intricacies of quantum mechanics and the elusive nature of fundamental particles. As I reached for my phone to check for any updates on the latest research papers, a notification caught my eye: "Higgs Boson Discovered: Scientists Confirm Existence of Particle Thought to Give Mass to Matter."My heart skipped a beat as I clicked on the link, my curiosity piqued to its utmost. The Higgs boson, also known as the "God Particle," had been the subject of intense speculation and search for decades. Its discovery would not only validate a key prediction of the Standard Model of particle physics but also shed light on one of the most fundamental questions of our universe: how do particles acquire mass?As I read through the article, I felt a mix of emotions – excitement, disbelief, and a sense of awe at the sheer brilliance of human ingenuity. I couldn't help but reminisce about the countless hours spent poring over textbooks, trying to comprehend the complexities of particle physics. Suddenly, those abstract concepts seemed to take on a new meaning, as if the very fabric of reality was being unveiled before my eyes.I immediately shared the news with my family and friends, eager to discuss the implications of this groundbreaking discovery. We spent hours discussing the significance of the Higgs boson, its potential applications, and what it might mean for future research in physics. That night, the Higgs boson became more than just a scientific term; it became a symbol of human perseverance and the relentless pursuit of knowledge.Looking back, I realize that this moment was not just about the discovery of a particle but also about the power of curiosity and the thrill of discovery. It reminded me why I had chosen to study physics in the first place – to uncover the mysteries of the universe and contribute to the ever-growing body of human knowledge. As I continue to navigate the complexities of life, I will always cherish that evening when the Higgs boson was discovered, a moment that forever changed my perspective on the wonders of the universe.。
每日刷新新纪录的英语作文
Every day,we are surrounded by numerous events and achievements that set new records.These records can be in various fields such as sports,technology,science,and even in our personal lives.The concept of setting and breaking records is a testament to human ambition and the relentless pursuit of excellence.In sports,athletes constantly push their limits to achieve new heights.For instance,Usain Bolt,the Jamaican sprinter,set a world record in the100meter dash with a time of9.58 seconds in2009.This record has not only inspired others to strive for greatness but also pushed the boundaries of what is physically possible.In the realm of technology,companies are always striving to create faster,more efficient, and more powerful devices.Apples iPhone,for example,has seen numerous iterations, each one boasting improved features and capabilities.The latest models offer advanced camera systems,faster processors,and longer battery life,all of which contribute to a better user experience.In the field of science,researchers are continually making groundbreaking discoveries that expand our understanding of the world.The discovery of the Higgs boson particle at CERN in2012was a monumental achievement that confirmed the existence of the Higgs field,a fundamental concept in the Standard Model of particle physics.On a personal level,we can also set and break our own records.Whether its improving our fitness levels,learning a new skill,or achieving a career milestone,setting personal goals and striving to surpass them can lead to a sense of accomplishment and personal growth.However,its important to remember that while setting and breaking records can be a source of motivation and inspiration,its also crucial to maintain a balanced perspective. Records are meant to be a benchmark for progress,not a measure of selfworth.Its essential to celebrate achievements but also to recognize that there is more to life than just breaking records.In conclusion,the pursuit of setting and breaking records is a reflection of human determination and the desire to push boundaries.Whether its in sports,technology, science,or personal endeavors,these records serve as a reminder of what can be achieved through dedication,hard work,and a nevergiveup attitude.。
好奇推动科学进步作文
好奇推动科学进步作文English Response:英文回答：Curiosity has been the driving force behind scientific progress for centuries. From the early days of exploring the cosmos to the intricate world of quantum mechanics, human curiosity has led to groundbreaking discoveries and innovations. Personally, I believe curiosity ignites the spark of exploration within us, propelling us forward in our quest for knowledge and understanding.One of the prime examples of curiosity drivingscientific progress is the discovery of penicillin by Alexander Fleming in 1928. Fleming's accidental observation of mold inhibiting bacterial growth sparked his curiosity, leading to the development of the first antibiotic. This chance discovery revolutionized medicine and saved countless lives, all because of one curious scientist'sobservation.Moreover, curiosity often leads to unexpected breakthroughs. Take the story of Percy Spencer, the inventor of the microwave oven, for instance. While working on radar technology during World War II, Spencer noticed that a candy bar in his pocket had melted due to the microwaves emitted by the radar equipment. His curiosity about this phenomenon ultimately led to the invention of the microwave oven, a kitchen staple in households worldwide.In my own experience, curiosity has been a driving force in my academic pursuits. Whenever I encounter a puzzling question or an unexplained phenomenon, mycuriosity pushes me to delve deeper, to ask more questions, and to seek answers through experimentation and research. This insatiable curiosity has not only expanded my knowledge but has also shaped my approach to problem-solving and critical thinking.Furthermore, curiosity fosters collaboration andinterdisciplinary research. When scientists from different fields come together to explore a common curiosity, remarkable discoveries often emerge. For instance, the discovery of the Higgs boson, a fundamental particle in particle physics, was the result of collaboration between physicists, engineers, and mathematicians, each driven by their curiosity to unravel the mysteries of the universe.In conclusion, curiosity is the driving force behind scientific progress, fueling our desire to explore the unknown and pushing the boundaries of human knowledge. Itis the curiosity of individuals that has led to some of the most significant scientific breakthroughs in history, shaping the world we live in today.中文回答：好奇心几个世纪以来一直是推动科学进步的动力。
科学家影响科学界作文素材
科学家影响科学界作文素材英文回答：Scientists play a crucial role in influencing the scientific community. They have the power to shape the direction of research, challenge existing theories, and introduce new ideas and concepts. Through their work, scientists contribute to the advancement of knowledge and drive scientific progress.One way scientists influence the scientific communityis through their research findings and publications. When scientists make groundbreaking discoveries or publish their work in reputable journals, they gain recognition and respect from their peers. Other scientists may be inspired by their findings and build upon them in their own research. For example, when Watson and Crick discovered the structure of DNA, their work revolutionized the field of biology and paved the way for further research on genetics.Scientists also influence the scientific community through their participation in conferences, seminars, and workshops. These events provide opportunities forscientists to present their research, exchange ideas, and receive feedback from their colleagues. By sharing their knowledge and expertise, scientists can inspire and motivate others in the scientific community. Additionally, scientists may collaborate with other researchers on projects, leading to the development of new theories and technologies. For instance, the collaboration between physicists Peter Higgs and François Englert led to the discovery of the Higgs boson, which confirmed the existence of the Higgs field and earned them the Nobel Prize in Physics.Furthermore, scientists have the responsibility to communicate their findings to the public and policymakers. Through media interviews, public lectures, and writing popular science books, scientists can educate the public about scientific advancements and their implications. This helps to foster public interest and support for scientific research. For example, renowned astrophysicist NeildeGrasse Tyson has popularized science through histelevision shows, books, and engaging public speaking style, making complex scientific concepts accessible to a wider audience.In conclusion, scientists have a significant impact on the scientific community through their research,participation in scientific events, and communication with the public. Their contributions shape the direction of scientific research, inspire other scientists, and educate the public about scientific advancements. Scientists arenot only researchers but also influencers, drivingscientific progress and shaping the future of science.中文回答：科学家在影响科学界方面起着至关重要的作用。
和物理有关的作文句子英语
和物理有关的作文句子英语From the smallest particle to the vast cosmos, physics unlocks the secrets of the universe, challenging our understanding of reality.1. The discovery of the Higgs boson at CERN marked a monumental leap in our comprehension of the fundamental forces that shape our existence.2. Through the lens of quantum mechanics, we peer into the probabilistic nature of subatomic particles, where uncertainty is the only certainty.3. As Einstein's theory of relativity suggests, time and space are not the static stage we once believed, but a dynamic fabric that warps and stretches with mass and energy.4. The laws of thermodynamics not only govern the behavior of heat and energy but also provide profound insights into the very direction of time itself.5. In the realm of astrophysics, black holes stand as enigmatic sentinels, their gravitational pull so strong that not even light can escape their clutches.6. The development of the Standard Model has been a triumph of modern physics, cataloging the elementary particles that make up all known matter.7. The quest for a unified theory continues to be a driving force in physics, as scientists seek to reconcile the seemingly incompatible realms of quantum mechanics andgeneral relativity.8. Nanotechnology, a field born from the principles of physics, promises to revolutionize industries by manipulating matter at the atomic and molecular scale.9. The Doppler effect, a simple yet powerful principle,allows astronomers to measure the velocities of celestial bodies, providing a deeper understanding of the universe's expansion.10. As we harness the power of nuclear fusion, the processthat powers the stars, we edge closer to a future where clean, abundant energy could be within our grasp.11. The concept of dark matter and dark energy introduces usto the idea that the majority of our universe is composed of substances that remain invisible to our current methods of detection.12. The study of physics is not just about equations and experiments; it's a journey into the heart of nature, where every discovery has the potential to reshape our world.。
重要事件英文作文
重要事件英文作文1. The moon landing in 1969 was a historic moment for mankind, showcasing our ability to reach beyond the confines of Earth and explore the unknown.2. The fall of the Berlin Wall in 1989 marked the end of an era and symbolized the reunification of East and West Germany, bringing hope for a more united world.3. The 9/11 terrorist attacks in 2001 shocked the world and changed the way we think about security and terrorism, leading to increased vigilance and global cooperation.4. The election of Barack Obama as the first African American president of the United States in 2008 was a significant milestone in the fight for equality and diversity.5. The outbreak of the COVID-19 pandemic in 2020 brought the world to a standstill, highlighting theimportance of global health cooperation and preparedness.6. The signing of the Paris Agreement in 2015 was a crucial step towards addressing climate change and protecting the environment for future generations.7. The #MeToo movement, which gained momentum in 2017, shed light on the prevalence of sexual harassment and assault, sparking important conversations about gender equality and empowerment.8. The legalization of same-sex marriage in various countries around the world has been a major victory for LGBTQ rights and equality.9. The Black Lives Matter protests in 2020 sparked a national conversation about racial injustice and police brutality, leading to calls for systemic change and reform.10. The discovery of the Higgs boson particle in 2012 was a groundbreaking achievement in the field of particlephysics, furthering our understanding of the universe and how it works.。
日新月异的变化作文500字
日新月异的变化作文500字英文回答：The world is constantly changing at an unprecedented pace. Every day, there are new advancements in technology, shifts in social norms, and discoveries in science. These changes have a profound impact on our lives, shaping theway we live, work, and interact with one another.One area where we can see rapid change is in technology. The development of smartphones, for example, has revolutionized the way we communicate and access information. Just a few decades ago, cell phones were bulky devices used primarily for making calls. Now, we can useour smartphones to send messages, take photos, browse the internet, and even control our homes. The constantevolution of technology means that there is always something new to learn and adapt to.Another area where change is evident is in the realm ofsocial norms. Society's views on various issues such as gender equality, LGBTQ+ rights, and racial equality have evolved significantly over the years. What was once considered acceptable or normal may now be seen as outdated or discriminatory. These changes reflect a growing understanding and acceptance of diversity and theimportance of equality.In the field of science, breakthroughs and discoveries are happening at an astonishing rate. From advancements in medicine to developments in space exploration, our understanding of the world and the universe is constantly expanding. For example, the discovery of the Higgs boson particle in 2012 was a major milestone in particle physics and opened up new possibilities for scientific research.中文回答：世界正在以前所未有的速度不断变化。
物理学考研英语真题答案
物理学考研英语真题答案一、选择题1. The term "photon" refers to:A. A unit of energyB. A fundamental particle of lightC. A type of electromagnetic waveB. A fundamental particle of light2. According to the Heisenberg Uncertainty Principle, whichof the following statements is correct?A. The more precisely the position of a particle is known, the less precisely its momentum can be known.B. The principle is only applicable to subatomic particles.C. The principle does not apply to macroscopic objects.A. The more precisely the position of a particle is known, the less precisely its momentum can be known.3. The phenomenon of quantum entanglement is best described as:A. The correlation between particles that have interactedin the past.B. The ability of particles to communicate faster than the speed of light.C. The phenomenon where the state of one particle is instantly correlated with the state of another, regardless of distance.C. The phenomenon where the state of one particle isinstantly correlated with the state of another, regardless of distance.二、阅读理解Read the following passage and answer the questions:Passage:The discovery of the Higgs boson in 2012 at the Large Hadron Collider (LHC) was a significant milestone in the field of particle physics. The Higgs boson is associated with theHiggs field, which is believed to give other particles mass. The existence of the Higgs boson was predicted by theStandard Model of particle physics, and its discovery confirmed a key component of this theory.Questions:1. What is the Higgs boson associated with?Answer: The Higgs boson is associated with the Higgs field.2. What does the Higgs field give to other particles?Answer: The Higgs field is believed to give otherparticles mass.3. Which theory predicted the existence of the Higgs boson?Answer: The existence of the Higgs boson was predicted by the Standard Model of particle physics.三、翻译1. 将以下句子从中文翻译成英文：- 中文：量子力学是研究微观粒子行为的物理学分支。
2022考研英语阅读捕获希格斯粒子
2022考研英语阅读捕获希格斯粒子Looking for the Higgs捕获希格斯粒子Enemy in sight?敌军现身?The search for the Higgs boson is closing in on its quarry希格斯玻色子的讨论接近其目标ON JULY 22nd two teams of researchers based at CERN, Europe s main particle-physicslaboratory, near Geneva, told a meeting of the European Physical Society in Grenoble thatthey had found the strongest hints yet that the Higgs boson does, in fact, exist.7月22日，驻欧洲粒子物理讨论所的两组讨论人员在格勒诺布尔欧洲物理协会的一次会议上声称，他们已经得到迄今为止最有力的线索，将力证希格斯玻色子的确真实存在。
The Higgs is thelast unobserved part of the Standard Model, a 40-year-old theory which successfullydescribes the behaviour of all the fundamental particles and forces of nature bar gravity.希格斯粒子是基础模型中最终一个尚未观测到的组件，基础模型已有40年的历史，它胜利地描述了全部基础粒子的行为及除重力以外的全部自然力。
Mathematically, the Higgs is needed to complete the modelbecause, otherwise, none of theother particles would have any mass.在数学层面上，希格斯粒子对于完成模型是必不行少的，这是由于，一旦缺少它，全部的其它粒子都将会失去质量。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
Fabio Maltoni†
Centro Studi e Ricerche “Enrico Fermi” via Panisperna, 89/A - 00184 Rome, Italy E-mail: maltoni@fis.uniroma3.it
Abstract: The scattering amplitudes for Higgs + 5 partons are computed, with the Higgs boson produced via gluon fusion in the large Mtop limit. A parton-level analysis of Higgs + 3 jet production via gluon fusion and via weak-boson fusion is presented, and the effectiveness of a central-jet veto is analysed. Keywords: QCD; Higgs.
†
∗
1. Introduction
The mechanism that governs the electroweak symmetry breaking is at present the largest unknown in the Standard Model (SM) of elementary particle physics. The canonical mechanism, the Higgs model, is a keystone of the SM and its supersymmetric extensions. However, it is based on the existence of a CP-even scalar particle, the Higgs boson, which has not been detected yet and is the most wanted particle of the Fermilab Tevatron and the CERN Large Hadron Collider (LHC) physics programmes. The direct search in the e+ e− → ZH process at the CERN LEP2 collider has posed a lower bound of 114.1 GeV on the SM Higgs mass, MH [1–5]. On the other hand, a SM Higgs boson with a mass of the order of 200 GeV or less is favoured by analyses of the electroweak precision data [6]. Thus the intermediate mass region (MH 200 GeV) seems to be preferred. In pp-collisions, the dominant production mechanism over the entire Higgs mass range accessible at LHC is via gluon fusion gg → H [7], where the coupling of the Higgs to the gluons is mediated by a heavy quark loop, (left-hand panel of Fig. 1). In the SM, the leading contribution comes fromother quarks being 2 /M 2 ). The second largest production mechanism is via at least smaller by a factor O(Mb top weak-boson fusion (WBF), qq → qqH (right-hand panel of Fig. 1)∗ . In addition, it is a key component of the program to measure the Higgs boson couplings at LHC [9]. Higgs production via WBF occurs as the scattering between two (anti)quarks with weak-boson (W or Z ) exchange in the t-channel and with the Higgs boson radiated off the weak-boson propagator. Since the distribution functions of the incoming valence quarks peak at values of the momentum fractions x ≈ 0.1 to 0.2, Higgs production via WBF tends to produce naturally two highly energetic outgoing quarks. In addition, the weakboson mass provides a natural cutoff on the weak-boson propagator, thus two jets with a transverse energy typically of the order of a fraction of the weak-boson mass can be easily produced. Therefore a large fraction of the events of the total cross section for Higgs production via WBF occurs with two jets with a large rapidity interval between them, typically one at forward and the other at backward rapidities. By considering Higgs production in association with two jets, and by selecting events with a large dijet invariant mass and with a large rapidity separation between the jets, the WBF production channel can be made larger than the gluon fusion one [10, 11]. In Refs. [10, 11], Higgs + 2 jet events have been analysed at leading order in αS . A broader dijet mass distribution, together with a tendency to have larger rapidity intervals between the two jets, for WBF than for gluon fusion was found. However, Higgs + 2 jet production via gluon fusion features a strong dependence on the renormalisation scale, because it is a calculation to O(α4 S ). The next-to-leading order (NLO) corrections to Higgs + 2 jet production via WBF are known and have been found to be typically modest, of the order of 5 to 10% [12]. Thus Higgs production via WBF is under a good theoretical control. NLO corrections to Higgs + 2 jet production via gluon fusion are not known. Such a calculation would be quite formidable. In fact, since the Higgs boson is produced via a
√ In terms of significance, i.e. ratio of signal over root of background S/ B , Higgs production via WBF may be larger than the one via gluon fusion [8].
∗
–1–
Ï
À
Ï
À
Figure 1: Higgs production via gluon fusion (left) and via WBF (right).
loop, a calculation of the production rate is quite involved, even at leading order in αS : in Higgs + 2 jet production via gluon fusion up to pentagon loops occur. Evaluating the NLO corrections would require to calculate amplitudes with up to either hexagon loops or pentagon double loops. On the other hand, it is known that the NLO corrections to the total rate of Higgs production via gluon fusion are large, increasing the production rate by up to 80% [13, 14], and so are the NLO corrections to Higgs + 1 jet production (computed in the large Mtop limit) [15–18]. Thus, we are led to expect that also the unknown NLO corrections to Higgs + 2 jet production be large. Even though a full NLO calculation of Higgs + 2 jet production via gluon fusion is not feasible with the present technology, it could be done in the large top-quark mass 2 ≪ 4M 2 , whereby the gluon-Higgs coupling via the top-quark loop is given by limit, MH top a low-energy theorem through an effective Lagrangian [19, 20], Leff = 1 a AHGa µν G 4