Search for the flavor-changing neutral current interactions of the top quark and the higgs boson which decays into a pair of b quarks at √s = 13 TeV


Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., ...Daha Fazla

Journal of High Energy Physics, cilt.2018, sa.6, ss.1-36, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2018 Sayı: 6
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/jhep06(2018)102
  • Dergi Adı: Journal of High Energy Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1-36
  • Anahtar Kelimeler: FCNC Interaction, Hadron-Hadron scattering (experiments), Higgs physics, Top physics
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

A search for flavor-changing neutral currents (FCNC) in events with the top quark and the Higgs boson is presented. The Higgs boson decay to a pair of b quarks is considered. The data sample corresponds to an integrated luminosity of√35.9 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s = 13 TeV. Two channels are considered: single top quark FCNC production in association with the Higgs boson (pp → tH), and top quark pair production with FCNC decay of the top quark (t → qH). Final states with one isolated lepton and at least three reconstructed jets, among which at least two are associated with b quarks, are studied. No significant deviation is observed from the predicted background. Observed (expected) upper limits at 95% confidence level are set on the branching fractions of top quark decays, B(t → uH) < 0.47% (0.34%) and B(t → cH) < 0.47% (0.44%), assuming a single nonzero FCNC coupling.