منابع مشابه
Lepton Universality
The topic of lepton universality is directly related to the structure of the fundamental fermion elds and the dynamics generating it. It can be investigated independently for the charged and the neutral weak interactions. The precise measurements of the neutral couplings achieved at LEP and SLC are the key ingredients for the investigation of electroweak radiative corrections and the indirect i...
متن کاملLepton Universality Tests with Kaons
Precision data on K l3 and K l2 decay rates and form factors allow us to perform significant tests of lepton universality and to constrain the strength of non-standard interactions. The present status of these tests and new physics searches are discussed, as obtained by combining all the available results of the various kaon physics experiments. c Copyright owned by the author(s) under the term...
متن کاملLepton Universality Breaking vs Lepton Flavor Violation in Kaon Physics
Deviations from the Standard Model (SM) expectations of the Lepton Universality (LU) breaking represent a powerful tool to probe New Physics (NP) effects. Kaon physics is an obvious ground where to perform such tests, for instance in the well studied R K = B(K → eν)/B(K → μν). Supersymmetric (SUSY) extensions of the Standard Model can exhibit μ − e non-universal contributions. Their origin is t...
متن کاملLepton Universality, Rare Decays and Split Fermions
We investigate the constraint on the split fermions in extra dimensions by considering the universality ofW leptonic decaysW → liνi, the charged lepton decays li → ljνiν̄j, and the lepton flavor violating process li → l̄jlklh where li = e, μ or τ . For the Standard Model (SM) background of W → liνi, we extended the one loop quantum correction to include effects of order ml /M 2 W and the Higgs ma...
متن کاملInterpreting Hints for Lepton Flavor Universality Violation
We interpret the recent hints for lepton flavor universality violation in rareB meson decays. Based on a model-independent effective Hamiltonian approach, we determine regions of new physics parameter space that give a good description of the experimental data on RK and RK∗ , which is in tension with Standard Model predictions. We suggest further measurements that can help narrowing down viable...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2008
ISSN: 1742-6596
DOI: 10.1088/1742-6596/110/7/072009