نتایج جستجو برای: violation
تعداد نتایج: 22062 فیلتر نتایج به سال:
A bstract We show that the rotation of QCD axion field, aided by B?L violation from supersymmetric R -parity violating couplings, can yield observed baryon abundance. Strong sphaleron processes transfer angular momentum field into a quark chiral asymmetry, which couplings convert to asymmetry Universe. focus on case dimensionless with textures motivated grand unified theories and comment more g...
A bstract Solutions of the Strong CP Problem based on spontaneous breaking must feature a non-generic structure and simultaneously explain coincidence between priori unrelated CP-even CP-odd mass scales. We show that these properties can emerge from gauge invariance CP-conserving, but otherwise generic, physics at Planck scale. In our scenarios no fundamental scalar is introduced beyond Standar...
We have performed the first search for CP violation in tau lepton decay. CP violation in lepton decay does not occur in the minimal standard model but can occur in extensions such as the multi-Higgs doublet model. It appears as a characteristic difference between the τ and τ decay angular distributions for the semi-leptonic decay modes such as τ → Kπν. We define an observable asymmetry to explo...
The leading weak corrections to the production of top quark pairs via qq̄ → tt̄ in pp̄ collisions are evaluated. The chromo-anapole form factor of the top quark and effects of parity violation are studied in the Standard Model (SM) and the Minimal Supersymmetric Model (MSSM). The parity violation effect in qq̄ → g → tt̄ from the SM weak corrections is found to be very small. In the MSSM, the effects...
One possible feature of quantum gravity may be the violation of Lorentz invariance. In this paper we consider one particular manifestation of the violation of Lorentz invariance, namely modified dispersion relations for massive neutrinos. We show how such modified dispersion relations may affect atmospheric neutrino oscillations. We then consider how neutrino telescopes, such as ANTARES, may be...
CP violating asymmetries of b quarks and leptons in e + e − → tt̄ and supersymmetry review Ekaterina
The distributions of the single decay b-quarks and leptons from e+e− → tt̄ assuming CP violation are reviewed. Different asymmetries , sensitive independently to CP violation in the production and in the decay, and sensitive to the real and imaginary parts of d and d are defined. The analytic expressions are general and independent on the model of CP violation. In most of them all phase space in...
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