Lepton Flavor Violating Higgs decays at the Compact Linear Collider

TL;DR

This study evaluates the potential of the future Compact Linear Collider (CLIC) to detect or constrain lepton flavor violating Higgs decays, setting expected upper limits on their branching ratios.

Contribution

It provides the first detailed sensitivity analysis of CLIC for specific lepton flavor violating Higgs decay channels.

Findings

95% CL upper limits of 10^{-4} to 10^{-5} on branching ratios

Sensitivity estimates at 1.4 TeV and 3 TeV energies

Assumes integrated luminosities of 4 ab^{-1} and 5 ab^{-1}

Abstract

Lepton flavor violating Higgs decays could appear in scenarios beyond the Standard Model of particle physics. In this article, we study the sensitivity of a future Compact Linear Collider (CLIC) to such processes, namely, $h\rightarrow e\mu$, $h\rightarrow\tau\mu$, and $h\rightarrow e\tau$. In the absence of any observation, 95\% CL\ upper limits in the region of $10^{-4}$ to $10^{-5}$ could be placed on the branching fractions of these processes, assuming integrated luminosities of $4$\,ab$^{-1}$ at $\sqrt{s}=1.4$ TeV and $5$\,ab$^{-1}$ at $\sqrt{s}=3$ TeV.