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Lecture notes
Lecture notes

Baryons in O (4) and Vibron Model
Baryons in O (4) and Vibron Model

Ecole Doctorale de Physique et de Chimie Physique
Ecole Doctorale de Physique et de Chimie Physique

**** 1 - CERN Indico
**** 1 - CERN Indico

Weakton Model of Elementary Particles and Decay Mechanisms
Weakton Model of Elementary Particles and Decay Mechanisms

Introduction toElementary Particle Phenomenology
Introduction toElementary Particle Phenomenology

... particles, then called τ and θ. Both were members of the newly found family of so-called strange particles, relatively long-lived objects that were being produced in the new accelerator experiments. The long lifetimes of these particles suggested that, although the final states often only contained ...
Hadron-Hadron Scattering at High Energies
Hadron-Hadron Scattering at High Energies

THE DISCOVERY OF ASYMPTOTIC FREEDOM AND THE EMERGENCE OF QCD
THE DISCOVERY OF ASYMPTOTIC FREEDOM AND THE EMERGENCE OF QCD

Lecture Notes on the Standard Model of Elementary Particle Physics
Lecture Notes on the Standard Model of Elementary Particle Physics

... Lie algebras, gauge-invariant Lagrangian field theories and the spontaneous breaking of continuous symmetries. The notes include a discussion of spinor fields since relativistic quantum mechanics is not always known to bachelor physicists. The second part is the construction of the Standard Model an ...
Prospects for a Charge-Asymmetry Measurement in Top
Prospects for a Charge-Asymmetry Measurement in Top

a = l 0
a = l 0

... We linearized in terms of the amplitudes u and v Axial symmetry: z-component of the angular momentum, mz and the principal quantum number, N s ...
Monday, Apr. 11, 2005
Monday, Apr. 11, 2005

Deconfined Quantum Criticality
Deconfined Quantum Criticality

Mathematical Principles of Theoretical Physics
Mathematical Principles of Theoretical Physics

Lecture 1
Lecture 1

or ppt
or ppt

Phys. Rev. Lett. 104, 255303
Phys. Rev. Lett. 104, 255303

... Bogoliubov quasiparticles have definite momentum referred to B, they cannot be labeled by ‘, because the condensate configuration breaks the symmetry under translation T y . The constant H 0c in Eq. (5) gives the zero-point correction to h0 which, along with the contribution from thermally excited q ...
A strange, elusive phenomenon called supersymmetry was
A strange, elusive phenomenon called supersymmetry was

... upersymmetry is a remarkable symmetry. In elementary particle physics, it interchanges particles of completely dissimilar types— the kind called fermions (such as electrons, protons and neutrons), which make up the material world, and those called bosons (such as photons), which generate the forces ...
Formula mass
Formula mass

The Concept of the Inert Mass in Macroscopic Physics and - if
The Concept of the Inert Mass in Macroscopic Physics and - if

Direct photon production in heavy-ion collisions
Direct photon production in heavy-ion collisions

Form Factor Dark Matter
Form Factor Dark Matter

Slides - Indico
Slides - Indico

Supersymmetry and Gauge Theory (7CMMS41)
Supersymmetry and Gauge Theory (7CMMS41)

Fulltext PDF - Indian Academy of Sciences
Fulltext PDF - Indian Academy of Sciences

< 1 ... 12 13 14 15 16 17 18 19 20 ... 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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