Effects of an H-mu-tau coupling in quarkonium lepton flavor violation decays

TL;DR

This paper investigates the potential effects of a non-zero H-mu-tau coupling on quarkonium lepton flavor violation decays, assessing experimental constraints and proposing tau decay channels for future confirmation.

Contribution

It analyzes the consistency of a proposed H-mu-tau coupling with existing quarkonium lepton flavor violation data and suggests promising decay channels for experimental verification.

Findings

The H-mu-tau coupling could explain observed lepton flavor violation signals.

The tau decay into a f0 and mu is a promising channel for future experiments.

Experimental limits could be significantly improved with Belle II.

Abstract

In this work we study the consistency of a possible non-vanishing coupling $H\mu \tau $ of the order of $3.6\times 10^{-3}$ as pointed recently by the CMS and ATLAS collaborations, with measured lepton flavor violation processes involving quarkonium. We show that the most promising channel to confirm this excess is to look for the lepton flavor tau decay into a $f_0$ and $\mu$ where the experimental limit could strongly improved with the new B factories as Belle II.