Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/11392
Title: Search for lepton-flavour-violating decays of the Higgs boson
Authors: Khachatryan, V
Sirunyan, AM
Tumasyan, A
Adam, W
Bergauer, T
Dragicevic, M
Erö, J
Friedl, M
Frühwirth, R
Ghete, VM
Hartl, C
Hörmann, N
Hrubec, J
Jeitler, M
Kiesenhofer, W
Knünz, V
Krammer, M
Krätschmer, I
Liko, D
Mikulec, I
Rabady, D
Rahbaran, B
Rohringer, H
Schöfbeck, R
Strauss, J
Treberer-Treberspurg, W
Waltenberger, W
Wulz, CE
Mossolov, V
Shumeiko, N
Suarez Gonzalez, J
Alderweireldt, S
Bansal, S
Cornelis, T
De Wolf, EA
Janssen, X
Knutsson, A
Lauwers, J
Luyckx, S
Ochesanu, S
Rougny, R
Van De Klundert, M
Van Haevermaet, H
Van Mechelen, P
Van Remortel, N
Van Spilbeeck, A
Blekman, F
Blyweert, S
D'Hondt, J
Daci, N
Heracleous, N
Keaveney, J
Lowette, S
Maes, M
Olbrechts, A
Python, Q
Strom, D
Tavernier, S
Van Doninck, W
Van Mulders, P
Van Onsem, GP
Villella, I
Caillol, C
Clerbaux, B
De Lentdecker, G
Dobur, D
Favart, L
Gay, APR
Grebenyuk, A
Léonard, A
Mohammadi, A
Perniè, L
Perniè, L
Randle-conde, A
Reis, T
Seva, T
Thomas, L
Vander Velde, C
Vanlaer, P
Wang, J
Zenoni, F
Adler, V
Beernaert, K
Benucci, L
Cimmino, A
Costantini, S
Crucy, S
Fagot, A
Garcia, G
Mccartin, J
Ocampo Rios, AA
Poyraz, D
Ryckbosch, D
Salva Diblen, S
Sigamani, M
Keywords: CMS;Physics;Higgs;Muons;Taus;Lepton-flavour-violation
Issue Date: 2015
Publisher: Elsevier
Citation: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 749: 337 - 362, (2015)
Abstract: The first direct search for lepton-flavour-violating decays of the recently discovered Higgs boson (H) is described. The search is performed in the H→μτ<inf>e</inf> and H→μτ<inf>h</inf> channels, where τ<inf>e</inf> and τ<inf>h</inf> are tau leptons reconstructed in the electronic and hadronic decay channels, respectively. The data sample used in this search was collected in pp collisions at a centre-of-mass energy of s=8 TeV with the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 19.7 fb<sup>-1</sup>. The sensitivity of the search is an order of magnitude better than the existing indirect limits. A slight excess of signal events with a significance of 2.4 standard deviations is observed. The p-value of this excess at M<inf>H</inf>=125 GeV is 0.010. The best fit branching fraction is B(H→μτ)=(0.84-0.37+0.39)%. A constraint on the branching fraction, B(H→μτ)<1.51% at 95% confidence level is set. This limit is subsequently used to constrain the μ-τ Yukawa couplings to be less than 3.6×10<sup>-3</sup>.
URI: http://www.sciencedirect.com/science/article/pii/S0370269315005638
http://bura.brunel.ac.uk/handle/2438/11392
DOI: http://dx.doi.org/10.1016/j.physletb.2015.07.053
ISSN: 0370-2693
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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