Bibcode
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Pree, E.; Rad, N.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Spitzbart, D.; Waltenberger, W.; Wittmann, J.; Wulz, C.-E.; Zarucki, M.; Chekhovsky, V.; Mossolov, V.; Suarez Gonzalez, J.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Beghin, D.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Starling, E.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O. et al.
Bibliographical reference
Journal of High Energy Physics, Volume 2018, Issue 6, article id. #1, 54 pp.
Advertised on:
6
2018
Citations
54
Refereed citations
51
Description
A search for lepton flavour violating decays of the Higgs boson in the
μτ and e τ decay modes is presented. The search is based on a
data set corresponding to an integrated luminosity of 35.9
fb-1 of proton-proton collisions collected with the CMS
detector in 2016, at a centre-of-mass energy of 13 TeV. No significant
excess over the standard model expectation is observed. The observed
(expected) upper limits on the lepton flavour violating branching
fractions of the Higgs boson are ℬ(H → μτ) < 0.25%
(0.25%) and ℬ(H → e τ) < 0.61% (0.37%), at 95%
confidence level. These results are used to derive upper limits on the
off-diagonal μτ and e τ Yukawa couplings √{{|{Y}_{μ
τ}|}^2+{|{Y}_{τ μ}|}^2}<1.43× {10}^{-3} and
√{{|{Y}_{eτ}|}^2+{|{Y}_{τ e}|}^2}<2.26× {10}^{-3}
at 95% confidence level. The limits on the lepton flavour violating
branching fractions of the Higgs boson and on the associated Yukawa
couplings are the most stringent to date. [Figure not available: see
fulltext.]