Collider Constraints on Lepton Flavor Violation in the 2HDM

TL;DR

This paper updates constraints on the Type-III 2HDM with lepton flavor violation using CMS data, emphasizing the importance of exploring lower mass regions below 200 GeV to better constrain the model.

Contribution

The study extends CMS analysis to lower Higgs masses and provides new bounds on the Type-III 2HDM parameter space with LFV, highlighting the significance of low-mass searches.

Findings

Constraints on heavy Higgs in 130-450 GeV range

Lower mass region (<200 GeV) is crucial for constraining the model

Future searches should focus on extending to lower masses

Abstract

In light of the recent CMS analysis on lepton flavor violating (LFV) heavy Higgs searches and updated bounds on various search channels involving neutral and charged scalars, we provide the updated constraints on the Type-III Two-Higgs-Doublet-Model (2HDM) with a $\tau-\mu$ LFV. In doing so, we first extend the CMS analysis to cover the mass region below 200 GeV by recasting their data. After obtaining the bounds on the heavy Higgs production in the mass range between 130 GeV and 450 GeV, we analyze the parameter space of the Type-III 2HDM with various scenarios of mass spectrum and heavy Higgs production strengths. We found that in most scenarios, searching for the heavy Higgs in the mass range lower than $2 m_W$ is very important in constraining the parameter space of the Type-III 2HDM. Hence, we suggest for the future analysis that the search window for the LFV heavy Higgs be extended to the lower mass region.