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

The CMS collaboration;Basegmez, Suzan;Beluffi, Camille;Bondu, Olivier;Vidal Maroño, Miguel;et.al.
(2015) Journal of High Energy Physics — Vol. 2015, n° 9, p. 201 [1-37] (2015)

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Authors
  • The CMS collaboration
    Author
  • Basegmez, SuzanUCLouvain
    Collaborator
  • Beluffi, CamilleUCLouvain
    Collaborator
  • Bondu, OlivierUCLouvain
    Collaborator
  • Bruno, GiacomoUCLouvain
    Collaborator
  • Castello, RobertoUCLouvain
    Collaborator
  • Caudron, AdrienUCLouvain
    Collaborator
  • Ceard, LudivineUCLouvain
    Collaborator
  • Da Silveira, Gustavo GilUCLouvain
    Collaborator
  • Delaere, Christopheorcid-logoUCLouvain
    Collaborator
  • Favart, DenisUCLouvain
    Collaborator
  • Forthomme, LaurentUCLouvain
    Collaborator
  • Giammanco, Andreaorcid-logoUCLouvain
    Collaborator
  • Hollar, JonathanUCLouvain
    Collaborator
  • Jafari, AbidehUCLouvain
    Collaborator
  • Jez, PavelUCLouvain
    Collaborator
  • Komm, MatthiasUCLouvain
    Collaborator
  • Lemaitre, VincentUCLouvain
    Collaborator
  • Mertens, AlexandreUCLouvain
    Collaborator
  • Nuttens, ClaudeUCLouvain
    Collaborator
  • Perrini, LuciaUCLouvain
    Collaborator
  • Pin, ArnaudUCLouvain
    Collaborator
  • Piotrzkowski, KrzysztofUCLouvain
    Collaborator
  • Popov, AndreyUCLouvain
    Collaborator
  • Quertenmont, LoïcUCLouvain
    Collaborator
  • Selvaggi, MicheleUCLouvain
    Collaborator
  • Vidal Maroño, MiguelUCLouvain
    Collaborator
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Abstract
A search for pair production of neutral color-octet weak-triplet scalar particles (Theta) is performed in processes where one Theta 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 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV. 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 Theta mass. The 95% confidence level lower bounds on the Theta 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.
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The CMS collaboration. (2015). Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, 2015(9), 201 [1-37]. https://doi.org/10.1007/JHEP09(2015)201 (Original work published 2015)