Bibcode
Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; De Wolf, E. A.; Janssen, X.; Knutsson, A.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; Daci, N.; De Bruyn, I.; Deroover, K.; Heracleous, N.; Lowette, S.; Moortgat, S.; Moreels, L.; Olbrechts, A.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Brun, H.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Léonard, A.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Garcia, G.; Gul, M.; Mccartin, J.; Poyraz, D.; Salva, S.; Schöfbeck, R.; Tytgat, M.; Van Driessche, W.; Yazgan, E.; Zaganidis, N.; Beluffi, C.; Bondu, O.; Brochet, S. et al.
Bibliographical reference
Journal of High Energy Physics, Volume 2017, Issue 2, article id. #79, 44 pp.
Advertised on:
2
2017
Citations
41
Refereed citations
31
Description
A search is performed for Higgs-boson-mediated flavor-changing neutral
currents in the decays of top quarks. The search is based on
proton-proton collision data corresponding to an integrated luminosity
of 19.7 fb-1 at a center-of-mass energy of 8 TeV collected
with the CMS detector at the LHC. Events in which a top quark pair is
produced with one top quark decaying into a charm or up quark and a
Higgs boson (H), and the other top quark decaying into a bottom quark
and a W boson are selected. The Higgs boson in these events is assumed
to subsequently decay into either dibosons or difermions. No significant
excess is observed above the expected standard model background, and an
upper limit at the 95% confidence level is set on the branching fraction
ℬ(t → Hc) of 0.40% and ℬ(t → Hu) of 0.55%, where
the expected upper limits are 0.43% and 0.40%, respectively. These
results correspond to upper limits on the square of the flavor-changing
Higgs boson Yukawa couplings | λ tc H
|2 < 6.9 × 10- 3 and | λ
tu H |2 < 9.8 × 10-
3.