Leptoquark-induced CLFV decays with a light SM-singlet scalar

Abstract

The Standard Model (SM), if augmented with a light SM-singlet scalar $\varphi$ and a TeV-scale scalar leptoquark (LQ) $S_1$, 2-body charged lepton flavor violating (CLFV) decay channels can be accessed with $\varphi$ as one of the final states, where the leading order effective interactions between $\varphi$ and the SM fields arise at one-loop level. Further, in the presence of $S_1$, $\varphi$ can mediate 3-body CLFV processes with either two photons or two gluons in the final states. Thus, the model predicts an exotic 3-body CLFV channel: ${\ell }_A\to {\ell }_{B}gg$, which can be tested/constrained only through some future high-energy experiments looking for di-gluon signals from a leptonic decay.

8 pages, 8 figures, 3 tables, published version

References in corpus (6)

• Neutrinophilic Non-Standard Interactions
• A search for two body muon decay signals
• An invisible axion model with controlled FCNCs at tree level
• Interpretation of Lepton Flavor Violation
• Upper limits on branching ratios of the lepton-flavor-violating decays $\tau \to \ell \gamma \gamma$ and $\tau \to \ell X$
• Direct production of SM-singlet scalars at the muon collider