Search for lepton flavour violating decays of the Higgs boson to e tau and e mu in proton-proton collisions at sqrt(s)=8 TeV

Abstract : A direct search for lepton flavour violating decays of the Higgs boson (H) in the H to e tau and H to e mu channels is described. The data sample used in the search was collected in proton-proton collisions at sqrt(s)=8 TeV with the CMS detector at the LHC and corresponds to an integrated luminosity of 19.7 inverse femtobarns. No evidence is found for lepton flavour violating decays in either final state. Upper limits on the branching fractions, B(H to e tau )<0.69% and B(H to e mu)< 0.035%, are set at the 95% confidence level. The constraint set on B(H to e tau) 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.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2016, 763, pp.472. 〈10.1016/j.physletb.2016.09.062〉

http://hal.in2p3.fr/in2p3-01346036
Contributeur : Dominique Girod <>
Soumis le : lundi 18 juillet 2016 - 11:24:18
Dernière modification le : jeudi 10 mai 2018 - 02:00:19

Citation

V. Khachatryan, S. Ganjour, A. Givernaud, P. Gras, G. Hamel De Monchenault, et al.. Search for lepton flavour violating decays of the Higgs boson to e tau and e mu in proton-proton collisions at sqrt(s)=8 TeV. Physics Letters B, Elsevier, 2016, 763, pp.472. 〈10.1016/j.physletb.2016.09.062〉. 〈in2p3-01346036〉

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