Generalized 2HDM with wrong-sign lepton Yukawa coupling, in light of $g_{\mu}-2$ and lepton flavor violation at the future LHC

TL;DR

This paper explores a generalized Two Higgs Doublet Model with wrong-sign lepton Yukawa couplings, demonstrating its potential to explain the muon g-2 anomaly and lepton flavor violation signals at the LHC with enhanced detection prospects.

Contribution

It introduces a novel parameter space in a generalized 2HDM with wrong-sign Yukawa couplings, showing its capability to address muon g-2 and lepton flavor violation simultaneously.

Findings

Significant parameter space satisfying muon g-2 and lepton flavor violation constraints.

Enhanced LHC detection prospects for low-mass pseudoscalar in flavor-violating decays.

Potential for >5σ significance detection at 14 TeV with 300 fb^{-1}.

Abstract

To explain the observed muon anomaly and simultaneously evade bounds from lepton flavor violation in the same model parameter space is a long cherished dream. In view of a generalized Two Higgs Doublet Model, with a Yukawa structure as a perturbation of Type-X, we are able to get substantial parameter space satisfying this criteria. We are focusing on a region with "{\bf wrong-sign}" lepton-Yukawa coupling which gives rise to an interesting phenomenological consequences. We found that in the "wrong-sign" region, it is possible to probe the low-mass pseudoscalar in flavor-violating decay mode with considerably better significance compared to the "right-sign" region. Performing a simple cut-based analysis we show that at 14 TeV run of the LHC with $300 fb^{-1}$ integrated luminosity, part of the model parameter space can be probed with significance $\geq 5\sigma$ which further improves with Artificial Neural Network analysis.