Lepton Flavour Violating Higgs Decays in the (SUSY) Inverse Seesaw

Abstract

The observation of charged lepton flavour violation would be a smoking gun for new physics and could help in pinpointing the mechanism at the origin of neutrino masses and mixing. We present here our recent studies of lepton flavour violating Higgs decays in the inverse seesaw and its supersymmetric embedding, two examples of low-scale seesaw mechanisms. We predict branching ratios as large as $10^{-5}$ for the decays $h\to \tau \mu$ and $h\to \tau e$ in the inverse seesaw, which can be probed in future colliders. Supersymmetric contributions can enhance the branching ratio of $h\to \tau \mu$ up to $1\%$, making it large enough to explain the small excess observed by ATLAS and CMS.

arXiv commentTalk presented at NuPhys2015 (London, 16-18 December 2015). 5 pages, 2 figures

References in corpus (9)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma
• Search for lepton-flavour-violating decays of the Higgs boson
• Imprints of massive inverse seesaw model neutrinos in lepton flavor violating Higgs boson decays
• Search for lepton-flavour-violating decays of the Higgs and $Z$ bosons with the ATLAS detector
• Enhancement of the lepton flavor violating Higgs boson decay rates from SUSY loops in the inverse seesaw model
• Exotic $\mu \tau jj$ events from heavy ISS neutrinos at the LHC