Search for excited quarks in the gamma plus jet final state in proton-proton collisions at root s=8 TeV


Khachatryan V., Sirunyan A. M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., ...Daha Fazla

PHYSICS LETTERS B, cilt.738, ss.274-293, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 738
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.physletb.2014.09.048
  • Dergi Adı: PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.274-293
  • Anahtar Kelimeler: CMS, Physics, Photon, Jet, PARTON DISTRIBUTIONS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A search for excited quarks decaying into the gamma + jet final state is presented. The analysis is based on data corresponding to an integrated luminosity of 19.7 fb(-1) collected by the CMS experiment in proton-proton collisions at root s = 8 TeV at the LHC. Events with photons and jets with high transverse momenta are selected and the gamma + jet invariant mass distribution is studied to search for a resonance peak. The 95% confidence level upper limits on the product of cross section and branching fraction are evaluated as a function of the excited quark mass. Limits on excited quarks are presented as a function of their mass and coupling strength; masses below 3.5 TeV are excluded at 95% confidence level for unit couplings to their standard model partners. (C) 2014 The Authors. Published by Elsevier B.V.