Search for Lepton-Flavour-Violating H → μτ Decays of the Higgs Boson with the ATLAS Detector


A direct search for lepton-flavour-violating H -> mu tau decays of the recently discovered Higgs boson with the ATLAS detector at the LHC is presented. The analysis is performed in the H -> mu tau(had) channel, where tau(had) is a hadronically decaying tau-lepton. The search is based on the data sample of proton-proton collisions collected by the ATLAS experiment corresponding to an integrated luminosity of 20.3 fb(-1) at a centre-of-mass energy of root s = 8TeV. No statistically significant excess of data over the predicted background is observed. The observed (expected) 95% confidence-level upper limit on the branching fraction, Br(H -> mu tau), is 1.85% (1.24%).



Hadron-hadron scattering, Standard Model, Higgs bosons, Dilepton production, Hadron colliders, Particles (Nuclear physics), Atomic mass


CC BY 4.0 (Attribution), ©2015 The Authors