Search for lepton flavour violating decays of the Higgs boson to eτ and eμ in proton–proton collisions at s=8 TeV
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol.763, pp.472-500, 2016 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 763
- Publication Date: 2016
- Doi Number: 10.1016/j.physletb.2016.09.062
- Journal Name: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.472-500
- Keywords: CMS, Higgs, Lepton-flavour-violation, Physics
- Yıldız Technical University Affiliated: Yes
Abstract
A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτ and H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at s=8 TeV with the CMS detector at the LHC and corresponds to an integrated luminosity of 19.7 fb−1. No evidence is found for lepton flavour violating decays in either final state. Upper limits on the branching fractions, B(H→eτ)<0.69% and B(H→eμ)<0.035%, are set at the 95% confidence level. The constraint set on B(H→eτ) is an order of magnitude more stringent than the existing indirect limits. The limits are used to constrain the corresponding flavour violating Yukawa couplings, absent in the standard model.