INPP Seminar | Probing Lepton-flavour violation in the Higgs Sector With Hadronic Tau Decays, Oct. 14

Emilie Passemar

The Institute of Nuclear and Particle Physics (INPP) presents Emilie Passemar, of the Indiana University, Bloomington, presenting “Probing Lepton-flavour violation in the Higgs Sector With Hadronic Tau Decays,” on Tuesday, Sept. 14, at at 3:30 p.m. in Clippinger Lab 259.

Abstract: With the discovery of a new boson with a mass around 125 GeV that is, thus far, compatible with the standard-model Higgs, we have entered a new era in the understanding of the electroweak symmetry-breaking mechanism. Searches for lepton-flavour violating (LFV) effects at the LHC associated with the Higgs sector offer an interesting possibility to test new physics scenarios. Low-energy constraints still allow for sizable flavour-changing decay rates of the 125 GeV boson into leptons, h→????e and h→????μ. In this talk, I will discuss the special role played by hadronic tau-lepton decays in this quest, and, in particular, by decays ????→eππ and ????→μππ. A remarkable feature is that at low energy the effective Higgs coupling to gluons induced by heavy quarks contributes to hadronic tau-decays establishing a direct connection with the relevant process at the LHC, pp(gg)→h→l????. Finally, we will explore the discriminating power of hadronic tau decays for probing LFV in new physics scenarios.