2019/04/01 by Shiyong Hu, Hu, Shiyong, Sam Ming-Yin Wong +3
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1904.00568
openalex publication_date 2019/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A sterile neutrino at GeV mass scale is of particular interest in this work. Though not take part in neutrino oscillation, the sterile neutrino can induce flavor violating semileptonic and leptonic decay of K, D and B mesons. We calculated a box diagram contribution in these processes. By making use of current experiment limit of lepton flavor violating decays M+h→ Ml+ℓ1+ℓ2- and M0→ ℓ1-ℓ2+, we explore the allowed parameter space of Ue4 and Uμ4 in different mass ranges. Generally speaking, both channels give a limit to the product of Ue4 and Uμ4. When sterile neutrino mass is located in between pion and kaon mass, K+→ π+ e±μ∓ gives the strongest constraint while B+→ π+ e± μ∓ provides the dominated constraint when its mass in between of kaon and B meson. If sterile neutrino is even heavier than B mesons, the B0s→ μ± e∓ experiment which is performed at LHCb gives the strongest constraint.