Enhancement of the lepton flavor violating Higgs boson decay rates from SUSY loops in the inverse seesaw model

Abstract

In this article we study the full one-loop SUSY contributions to the lepton flavor violating Higgs decay $h\to \tau \bar{\mu }$, within the context of the supersymmetric inverse sesaw model. We assume that both the right-handed neutrino masses, $M_R$, and their supersymmetric partner masses, $m_{{\tilde{\nu }}_R}$, are not far from the interesting $\mathcal{O}(\mathrm{TeV})$ energy scale, and we work with scenarios with large neutrino Yukawa couplings that transmit large lepton flavor violating effects. By exploring the behavior with the most relevant parameters, mainly $M_R$, $m_{{\tilde{\nu }}_R}$ and the trilinear sneutrino coupling $A_{\nu }$, we will look for regions of the parameter space where the enhancement of $\mathrm{BR}(h\to \tau \bar{\mu })$ is large enough to reach values at the percent level, which could explain the excess recently reported by CMS and ATLAS at the CERN Large Hadron Collider.

14 pages, 5 figures, 2 new figures, 1 new section and 2 new appendices, references added, conclusions unchanged, matches version to appear in PRD

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