The Lepton Flavor Changing Decays and One-loop Muon Anomalous Magnetic Moment in the Extended Mirror Twin Higgs Models

TL;DR

This paper investigates lepton flavor violation and muon magnetic moment contributions in extended Mirror Twin Higgs models, constraining parameter spaces and exploring potential experimental tests.

Contribution

It provides the first detailed analysis of LFV processes and muon magnetic moment contributions within extended MTH models, incorporating heavy neutrinos and gauge bosons.

Findings

Current experimental data strongly constrain model parameters.

Certain LFV processes could be tested in future colliders.

One-loop contributions do not resolve the muon g-2 discrepancy.

Abstract

Mirror Twin Higgs(MTH) models always contain heavy gauge bosons and extra Higgses. Besides, to accommodate tiny neutrino masses via seesaw mechanism, new heavy neutrinos can also be introduced in MTH extension models. Such new particles and interactions may lead to new contributions to the lepton flavor violating (LFV) processes, including $\ell_i \to \ell_j\gamma$ and $\ell_i \to \ell_j\ell_k\ell_l$. We find that current experimental data can stringently constrain the parameter spaces and certain LFV processes can possibly be tested by the next generation colliders. One-loop contributions of the new particles to the muon anomalous magnetic momentumare also calculated. Such contributions can still not solve the discrepancy between the experiments and the prediction of the standard model.