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File - AMS02 BOLOGNA
File - AMS02 BOLOGNA

LHC - Groups
LHC - Groups

New Frontiers in Particle Physics.
New Frontiers in Particle Physics.

... The Higgs Boson That’s almost the whole story…. But the gauge symmetries of the Standard Model do not permit particles to carry mass! Q. How is mass generated? A. By the non-trivial action of the vacuum! It grabs hold of things! ...
The Higgs Boson and Electroweak Symmetry Breaking
The Higgs Boson and Electroweak Symmetry Breaking

Rehearsal questions
Rehearsal questions

Particle Physics and the LHC
Particle Physics and the LHC

a S
a S

...  Virtual particles and range of forces Previous  Parity, charge conjugation, CP lecture  Weak decays of quarks  Charmonium and upsilon systems ...
12.5.2. QCD
12.5.2. QCD

Electroweak Theory - Florida State University
Electroweak Theory - Florida State University

Bosons
Bosons

Greetings and Purpose of This Meeting
Greetings and Purpose of This Meeting

Higgs-part
Higgs-part

... W and Z bosons (V) pick up mass from interaction with new scalar field Modifies V propagator from massless to effectively massive ...
Elements of a Physics Case for HE LHC
Elements of a Physics Case for HE LHC

Lecture 1 - Particle Physics Group
Lecture 1 - Particle Physics Group

125 GeV higgs in supersymmetry
125 GeV higgs in supersymmetry

PPT - The Center for High Energy Physics
PPT - The Center for High Energy Physics

Recreating the Big Bang
Recreating the Big Bang

... the pair production energy of a quark-antiquark pair, ...
Life in the Higgs condensate, where electrons have mass
Life in the Higgs condensate, where electrons have mass

HillCTEQ2
HillCTEQ2

... Testable in the Weak Interactions? Weyl Gravity in D=4 is QCD-like: Is the Higgs technically natural? On naturalness in the standard model. ...
Document
Document

Electroweak Physics (from an experimentalist!)
Electroweak Physics (from an experimentalist!)

The Higgs Boson and Fermion Masses
The Higgs Boson and Fermion Masses

... Q: What happens with missing d.o.f. (massless goldstone bosons P,H+ or ξ ) ? A: They become longitudinal d.o.f. of the gauge bosons Wμi, i=1,2,3 ...
What breaks electroweak symmetry
What breaks electroweak symmetry

... Fermi scale calculated in terms of the soft supersymmetry breaking parameters; generated by quantum corrections to the Higgs potential due to the large top quark mass ...
Plasma =   a fluid of free charged particles
Plasma = a fluid of free charged particles

< 1 ... 52 53 54 55 56

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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