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ppt - Cyclotron Institute
ppt - Cyclotron Institute

Determination of the Boltzmann Constant Using the Differential
Determination of the Boltzmann Constant Using the Differential

Phenomenology of Higgs Bosons Beyond the Standard Model
Phenomenology of Higgs Bosons Beyond the Standard Model

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The Standard Model of Particle Physics Piet Mulders

... • CPT is (to our present knowledge!) indeed a good symmetry of the world • CP is almost a good symmetry • Thus also time reversal is almost a good symmetry, but not exact! • This symmetry breaking allows for the surplus of matter over antimatter in the universe (even if this is only 1 : 109) Number ...
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DUAL NATURE OF DARK MATTER: COMPOSITE OF BOTH

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ppt file - Physics - Kent State University
ppt file - Physics - Kent State University

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Group-Symmetries and Quarks - USC Department of Physics

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Quantum Chromodynamical Explanation of the Strong Nuclear Force

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... – We know all the particles have corresponding antiparticles – If supersymmetry is correct, they would also have new, but much more massive relatives called superpartners Theoretically this is very nice – eliminates mathematical problems in standard model – allows unification of forces at much highe ...
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ModPhys III Lecture 5 - University of San Francisco

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Physics of Relativistic Heavy Ion Collisions at LHC

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Technicolor (physics)

Technicolor theories are models of physics beyond the standard model that address electroweak gauge symmetry breaking, the mechanism through which W and Z bosons acquire masses. Early technicolor theories were modelled on quantum chromodynamics (QCD), the ""color"" theory of the strong nuclear force, which inspired their name.Instead of introducing elementary Higgs bosons to explain observed phenomena, technicolor models hide electroweak symmetry and generate masses for the W and Z bosons through the dynamics of new gauge interactions. Although asymptotically free at very high energies, these interactions must become strong and confining (and hence unobservable) at lower energies that have been experimentally probed. This dynamical approach is natural and avoids issues of Quantum triviality and the hierarchy problem of the Standard Model.In order to produce quark and lepton masses, technicolor has to be ""extended"" by additional gauge interactions. Particularly when modelled on QCD, extended technicolor is challenged by experimental constraints on flavor-changing neutral current and precision electroweak measurements. It is not known what is the extended technicolor dynamics.Much technicolor research focuses on exploring strongly interacting gauge theories other than QCD, in order to evade some of these challenges. A particularly active framework is ""walking"" technicolor, which exhibits nearly conformal behavior caused by an infrared fixed point with strength just above that necessary for spontaneous chiral symmetry breaking. Whether walking can occur and lead to agreement with precision electroweak measurements is being studied through non-perturbative lattice simulations.Experiments at the Large Hadron Collider are expected to discover the mechanism responsible for electroweak symmetry breaking, and will be critical for determining whether the technicolor framework provides the correct description of nature. In 2012 these experiments declared the discovery of a Higgs-like boson with mass approximately 7002125000000000000♠125 GeV/c2; such a particle is not generically predicted by technicolor models, but can be accommodated by them.
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