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Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV

Journal articles  - Journal Article
Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; Brondolin, E; Dragicevic, M; Erö, J; Flechl, M ...
Published in: Journal of High Energy Physics
February 1, 2017
Published version (DOI)

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 |λtc H|2 < 6.9 × 10− 3 and |λtu H|2 < 9.8 × 10− 3.[Figure not available: see fulltext.]

Duke Scholars

Seog Oh
Author Seog Oh Physics
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Published In

Journal of High Energy Physics

DOI

10.1007/JHEP02(2017)079

EISSN

1029-8479

Publication Date

February 1, 2017

Volume

2017

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
 

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Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., … Brochet, S. (2017). Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV. Journal of High Energy Physics, 2017(2). https://doi.org/10.1007/JHEP02(2017)079
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, J. Brandstetter, et al. “Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV.” Journal of High Energy Physics 2017, no. 2 (February 1, 2017). https://doi.org/10.1007/JHEP02(2017)079.
Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, et al. Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV. Journal of High Energy Physics. 2017 Feb 1;2017(2).
Khachatryan, V., et al. “Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV.” Journal of High Energy Physics, vol. 2017, no. 2, Feb. 2017. Scopus, doi:10.1007/JHEP02(2017)079.
Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Erö J, Flechl M, Friedl M, Frühwirth R, Ghete VM, 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 CE, Mossolov V, Shumeiko N, Suarez Gonzalez J, Alderweireldt S, De Wolf EA, 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. Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at √s=8 TeV. Journal of High Energy Physics. 2017 Feb 1;2017(2).
Journal cover image

Published In

Journal of High Energy Physics

DOI

10.1007/JHEP02(2017)079

EISSN

1029-8479

Publication Date

February 1, 2017

Volume

2017

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics