2024/03/05 by Chuan-Hung Chen, Chen, Chuan-Hung, Cheng-Wei Chiang +1 · 1 citation
Physics and Astronomy · Medicine · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Medical Imaging Techniques and Applications
paper · pdf · doi:10.48550/arxiv.2403.02897
A scotogenic model can radiatively generate the observed neutrino mass, provide a dark matter candidate, and lead to rare lepton flavor-violating processes. We aim to extend the model to establish a potential connection to the quark flavor-related processes within the framework of scotogenesis, enhancing the unexpectedly large branching ratio (BR) of B+→ K+ νν, observed by Belle II Collaboration. Meanwhile, the model can address tensions between some experimental measurements and standard model (SM) predictions in flavor physics, such as the muon g-2 excess and the higher BR of Bs → μ- μ+. We introduce in the model the following dark particles: a neutral singlet Dirac-type lepton (N); two inert Higgs doublets (η1,2), with one of which carrying a lepton number; a charged singlet dark scalar (χ+), and a singlet vector-like up-type dark quark (T). The first two entities are responsible for the radiative neutrino mass, and χ+ couples to right-handed quarks and leptons and can resolve the tensions existing in muon g-2 and Bs→ μ- μ+. Furthermore, the BR of B+ → K+ νν can be enhanced up to a factor of 2 compared to the SM prediction through the mediations of the dark T and the charged scalars. In addition, we also study the impacts on the K→ πνν decays.