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Tung-Mow Yan
Tung-Mow Yan (; born 1937) is a Taiwanese-born American physicist, who has specialized in theoretical particle physics; primarily in the structure of elementary particles, the standard model, and quantum chromodynamics. He is professor emeritus at Cornell University. Education He graduated with a BS in physics in 1960 at National Taiwan University (NTU), an MS in physics at National Tsing Hua University (Hsinchu) in 1962, and earned a Ph.D. in physics in 1968 at Harvard University, under the supervision of Julian Schwinger. Research From 1970 to 2009 Yan worked at Cornell University, in particular the Cornell High-Energy Synchrotron Source and Laboratory for Elementary-Particle Physics (combined into the Cornell Laboratory for Accelerator-based Sciences and Education as of 2006). He became a professor in 19??. By 2010 he reached the status of professor emeritus in physics. Other affiliations during Yan's life and work are: *1968–1970: research associate at SLAC *1973–1974: v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theoretical Physics
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimental tools to probe these phenomena. The advancement of science generally depends on the interplay between experimental studies and theory. In some cases, theoretical physics adheres to standards of mathematical rigour while giving little weight to experiments and observations.There is some debate as to whether or not theoretical physics uses mathematics to build intuition and illustrativeness to extract physical insight (especially when normal experience fails), rather than as a tool in formalizing theories. This links to the question of it using mathematics in a less formally rigorous, and more intuitive or heuristic way than, say, mathematical physics. For example, while developing special relativity, Albert Einstein was concerned wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidney Drell
Sidney David Drell (September 13, 1926 – December 21, 2016) was an American theoretical physicist and arms control expert. At the time of his death, he was professor emeritus at the Stanford Linear Accelerator Center (SLAC) and senior fellow at Stanford University's Hoover Institution. Drell was a noted contributor in the fields of quantum electrodynamics and high-energy particle physics. The Drell–Yan process is partially named for him. Biography Born in Atlantic City, New Jersey, Drell graduated from Atlantic City High School. He earned his undergraduate degree in physics from Princeton University in 1946, having been admitted at the age of 16. Grimes, William"Sidney Drell, Who Advised Presidents on Nuclear Weapons, Dies at 90" ''The New York Times'', December 22, 2016. Accessed December 22, 2016. "Sidney David Drell was born on Sept. 13, 1926, in Atlantic City, to Jewish immigrants from the Russian empire." He was awarded a masters in physics in 1947 and received ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kenneth Lane (physicist)
Kenneth Douglas Lane is an American theoretical particle physicist and professor of physics at Boston University. Lane is best known for his role in the development of extended technicolor models of physics beyond the Standard Model. Career Lane received his B.Sc. and M.Sc. in physics at the Georgia Institute of Technology, and was a student of Chung Wook Kim at Johns Hopkins University, where he received his Ph.D. in 1970. His physics research focuses on the problems of electroweak and flavor symmetry breaking. With Estia J. Eichten, Lane co-invented extended technicolor. He and Eichten also contributed to early work on charmonium with Kurt Gottfried, Tom Kinoshita and Tung-Mow Yan. In 1984 he coauthored "Supercollider Physics" (with Eichten, Ian Hinchliffe and Chris Quigg), which has strongly influenced the quest for future discoveries at hadron colliders such as the Fermilab Tevatron The Tevatron was a circular particle accelerator (active until 2011) in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toichiro Kinoshita
Tōichirō Kinoshita (, '' Kinoshita Tōichirō ''; b. 23 January 1925 in Tokyo) is a Japanese-American theoretical physicist. Kinoshita studied physics at the University of Tokyo, earning his bachelor's degree in 1947 and then his PhD in 1952. Afterwards he spent two years as a postdoctoral researcher of the Institute of Advanced Study, Princeton, New Jersey, and then one year at Columbia University. His research interests include quantum field theory, and the Standard Model.T. Kinoshita History. American Institute of Physics (AIP). Accessed October 4, 2018. He has been working at since 1955. He was at first a research associate. In 1958 he became assistant professor, in 1960 associate pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estia J
''Estia'' ( el, Ἑστία, , hearth) is a Greek national daily broadsheet newspaper published in Athens, Greece. It was founded in 1876 as a literary magazine and then in 1894 has been transformed into a newspaper, making it Greece's oldest daily newspaper still in circulation. It is named after the ancient Greek goddess Hestia, one of the Twelve Olympians. ''Estia'' is widely regarded as right wing in terms of political alignment and most often referred to as “conservative” and “nationalist” and is readily distinguishable as the only Greek newspaper still employing the old-fashioned polytonic system of accentuation. An “opinion newspaper” with a writing style acknowledged to be “incisive” and with a loyal readership also described as “exclusive”, ''Estia'' is often treated not merely as a newspaper but as “an institution of bourgeois Athens”. On the 120th anniversary of its publication (March 12, 2014), the President of Greece Karolos Papoulias issued a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charmonium
In particle physics, quarkonium (from quark and -onium, pl. quarkonia) is a flavorless meson whose constituents are a heavy quark and its own antiquark, making it both a neutral particle and its own antiparticle. Light quarks Light quarks ( up, down, and strange) are much less massive than the heavier quarks, and so the physical states actually seen in experiments ( η, η′, and π0 mesons) are quantum mechanical mixtures of the light quark states. The much larger mass differences between the charm and bottom quarks and the lighter quarks results in states that are well defined in terms of a quark–antiquark pair of a given flavor. Heavy quarks Examples of quarkonia are the J/ψ meson (the ground state of charmonium, ) and the meson (bottomonium, ). Because of the high mass of the top quark, toponium ( θ meson) does not exist, since the top quark decays through the electroweak interaction before a bound state can form (a rare example of a weak process proceeding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quarkonium
In particle physics, quarkonium (from quark and -onium, pl. quarkonia) is a flavorless meson whose constituents are a heavy quark and its own antiquark, making it both a neutral particle and its own antiparticle. Light quarks Light quarks ( up, down, and strange) are much less massive than the heavier quarks, and so the physical states actually seen in experiments ( η, η′, and π0 mesons) are quantum mechanical mixtures of the light quark states. The much larger mass differences between the charm and bottom quarks and the lighter quarks results in states that are well defined in terms of a quark–antiquark pair of a given flavor. Heavy quarks Examples of quarkonia are the J/ψ meson (the ground state of charmonium, ) and the meson (bottomonium, ). Because of the high mass of the top quark, toponium ( θ meson) does not exist, since the top quark decays through the electroweak interaction before a bound state can form (a rare example of a weak process proceeding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parton (particle Physics)
In particle physics, the parton model is a model of hadrons, such as protons and neutrons, proposed by Richard Feynman. It is useful for interpreting the cascades of radiation (a parton shower) produced from quantum chromodynamics (QCD) processes and interactions in high-energy particle collisions. Model Parton showers are simulated extensively in Monte Carlo event generators, in order to calibrate and interpret (and thus understand) processes in collider experiments. As such, the name is also used to refer to algorithms that approximate or simulate the process. Motivation The parton model was proposed by Richard Feynman in 1969 as a way to analyze high-energy hadron collisions. Any hadron (for example, a proton) can be considered as a composition of a number of point-like constituents, termed "partons". The parton model was immediately applied to electron-proton deep inelastic scattering by Bjorken and Paschos. Component particles A hadron is composed of a number of point- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nucleon
In physics and chemistry, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus. The number of nucleons in a nucleus defines the atom's mass number (nucleon number). Until the 1960s, nucleons were thought to be elementary particles, not made up of smaller parts. Now they are known to be composite particles, made of three quarks bound together by the strong interaction. The interaction between two or more nucleons is called internucleon interaction or nuclear force, which is also ultimately caused by the strong interaction. (Before the discovery of quarks, the term "strong interaction" referred to just internucleon interactions.) Nucleons sit at the boundary where particle physics and nuclear physics overlap. Particle physics, particularly quantum chromodynamics, provides the fundamental equations that describe the properties of quarks and of the strong interaction. These equations describe quantitatively how quarks can bind toget ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Momentum
In Newtonian mechanics, momentum (more specifically linear momentum or translational momentum) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If is an object's mass and is its velocity (also a vector quantity), then the object's momentum is : \mathbf = m \mathbf. In the International System of Units (SI), the unit of measurement of momentum is the kilogram metre per second (kg⋅m/s), which is equivalent to the newton-second. Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force acting on it. Momentum depends on the frame of reference, but in any inertial frame it is a ''conserved'' quantity, meaning that if a closed system is not affected by external forces, its total linear momentum does not change. Momentum is also conserved in special relativity (with a modified formula) and, in a modified form, in electrodynamics, quantum mechanics, quan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parton Distribution Functions
In particle physics, the parton model is a model of hadrons, such as protons and neutrons, proposed by Richard Feynman. It is useful for interpreting the cascades of radiation (a parton shower) produced from quantum chromodynamics (QCD) processes and interactions in high-energy particle collisions. Model Parton showers are simulated extensively in Monte Carlo event generators, in order to calibrate and interpret (and thus understand) processes in collider experiments. As such, the name is also used to refer to algorithms that approximate or simulate the process. Motivation The parton model was proposed by Richard Feynman in 1969 as a way to analyze high-energy hadron collisions. Any hadron (for example, a proton) can be considered as a composition of a number of point-like constituents, termed "partons". The parton model was immediately applied to electron-proton deep inelastic scattering by Bjorken and Paschos. Component particles A hadron is composed of a number of point- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadron
In particle physics, a hadron (; grc, ἁδρός, hadrós; "stout, thick") is a composite subatomic particle made of two or more quarks held together by the strong interaction. They are analogous to molecules that are held together by the electric force. Most of the mass of ordinary matter comes from two hadrons: the proton and the neutron, while most of the mass of the protons and neutrons is in turn due to the binding energy of their constituent quarks, due to the strong force. Hadrons are categorized into two broad families: baryons, made of an odd number of quarks (usually three quarks) and mesons, made of an even number of quarks (usually two quarks: one quark and one antiquark). Protons and neutrons (which make the majority of the mass of an atom) are examples of baryons; pions are an example of a meson. "Exotic" hadrons, containing more than three valence quarks, have been discovered in recent years. A tetraquark state (an exotic meson), named the Z(4430), was discove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
