Search results for "Unparticle physics"

showing 3 items of 3 documents

Matter Effects in Neutrino Propagation

1989

After briefly reviewing the Mikheyev-Smirnov-Wolfenstein effect, I present a particle physics model where the required small neutrino mass arises from spontaneous R parity violation in supergravity theories. It is related to measurable processes associated with the existence of the Majoron and of supersymmetric (SUSY) particles. Astrophysical and laboratory limits tend to exclude regions of oscillation parameters where the high energy neutrinos are adiabatically converted. This suggests the possibility of a large reduction in the pp and 7 Be neutrino flux even for a mildly reduced 8 B neutrino flux, thus stressing the importance of the gallium experiments. Finally I consider other types of …

PhysicsParticle physicsSolar neutrinoHigh Energy Physics::PhenomenologyUnparticle physicsSolar neutrino problemMassless particleNuclear physicsMeasurements of neutrino speedHigh Energy Physics::ExperimentNeutrinoNeutrino oscillationParticle Physics - PhenomenologyMajoron
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Unparticle physics with jets

2007

Using methods of effective field theory, we show that after resummation of Sudakov logarithms the spectral densities of interacting quark and gluon fields in ordinary quantum field theories such as QCD are virtually indistinguishable from those of "unparticles" of a hypothetical conformal sector coupled to the Standard Model, recently studied by Georgi. Unparticles are therefore less exotic that originally thought. Models in which a hidden sector weakly coupled to the Standard Model contains a QCD-like theory, which confines at some scale much below the characteristic energy of a given process, can give rise to signatures closely resembling those from unparticles.

PhysicsQuantum chromodynamicsParticle physicsNuclear and High Energy PhysicsHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyUnparticle physicsFOS: Physical sciencesJet (particle physics)Standard ModelHidden sectorHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Effective field theoryQuantum field theoryResummationPhysics Letters B
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Lepton Flavour Violation in SUSY SO(10)

2008

The study of rare processes, which are suppressed or even forbidden in the Standard Model (SM) of particle physics, has been considered for a long time a powerful tool in order to shed light on new physics, especially for testing low-energy supersymmetry (SUSY). Indeed, taking into account the fact that neutrinos have mass and mix, the Standard Model predicts Lepton Flavour Violating (LFV) processes in the charged sector to occur at a negligible rate [1]. As a consequence, the discovery of such processes would be an unambigous signal of physics beyond the Standard Model. In the present years, we are experiencing a great experimental effort in searching for LFV processes; several experiments…

PhysicsStandard Model (mathematical formulation)Particle physicsPhysics beyond the Standard ModelHigh Energy Physics::PhenomenologyFlavourUnparticle physicsHigh Energy Physics::ExperimentSupersymmetryNeutrinoSO(10)Lepton
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