Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at √s= 8TeV


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The CMS collaboration C., Khachatryan V., Sirunyan A., Tumasyan A., Adam W., Asilar E., ...More

Journal of High Energy Physics, vol.2015, no.9, 2015 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 2015 Issue: 9
  • Publication Date: 2015
  • Doi Number: 10.1007/jhep09(2015)201
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Exotics, Hadron-Hadron Scattering
  • Erzincan Binali Yildirim University Affiliated: Yes

Abstract

© 2015, The Author(s).Abstract: A search for pair production of neutral color-octet weak-triplet scalar particles (Θ0) is performed in processes where one Θ0 decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb−1 of proton-proton collisions at √s = 8TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Θ0 mass. The 95% confidence level lower bounds on the Θ0 mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model.