Sterile neutrinos and RK

3rd Symposium on Prospects in the Physics of Discrete Symmetries

Vicente, A.^1

Laboratoire de Physique Théorique, CNRS-UMR 8627, Université de Paris-Sud 11, F-91405 Orsay Cedex, France^1

关键词: Charged current;    Inverse see saws;    Meson decays;    Mixing matrix;    Sterile neutrinos;    The standard model;    Tree level;    Unitarity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/447/1/012040/pdf
DOI  :  10.1088/1742-6596/447/1/012040

来源: IOP

【 摘 要 】

We consider an enhancement in the violation of lepton flavour universality in light meson decays arising from modified Wν couplings in the standard model minimally extended by sterile neutrinos. Due to the presence of additional mixings between the active neutrinos and the new sterile states, the deviation from unitarity of the leptonic mixing matrix intervening in charged currents might lead to a tree-level enhancement of RP Γ(P → ev)/Γ(P → μν), with P K, π. These enhancements are illustrated in the case of the inverse seesaw, showing that one can saturate the current experimental bounds on ΔrK (and Δrπ), while in agreement with the different experimental and observational constraints.