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

Vardan Khachatryan; A. M. Sirunyan; Armen Tumasyan; Hugues Brun; Francisco Javier Cuevas Maestro; Javier Fernández Menéndez; Santiago Folgueras Gómez; Isidro González Caballero; Collaboration Cms; CMS Collaboration; Abdulla Abdulsalam

doi:10.1007/JHEP09(2015)201

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No. of bitstreams: 0 Previous issue date: 2015-09-29 BMWFW (Austria) FWF (Austria) FNRS (Belgium) FWO (Belgium) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) MES (Bulgaria) CERN CAS, (China) MoST, (China) NSFC (China) COLCIENCIAS (Colombia) MSES (Croatia) CSF (Croatia) RPF (Cyprus) MoER, (Estonia) ERC IUT (Estonia) ERDF (Estonia) Academy of Finland, (Finland) MEC, (Finland) HIP (Finland) CEA (France) CNRS/IN2P3 (France) BMBF, (Germany) DFG, (Germany) HGF (Germany) GSRT (Greece) OTKA (Hungary) NIH (Hungary) DAE (India) DST (India) IPM (Iran) SFI (Ireland) INFN (Italy) MSIP (Republic of Korea) NRF (Republic of Korea) LAS (Lithuania) MOE (Malaysia) UM (Malaysia) CINVESTAV, (Mexico) CONACYT, (Mexico) SEP, (Mexico) UASLP-FAI (Mexico) MBIE (New Zealand) PAEC (Pakistan) MSHE (Poland) NSC (Poland) FCT (Portugal) JINR (Dubna) MON, (Russia) RosAtom, (Russia) RAS (Russia) RFBR (Russia) MESTD (Serbia) SEIDI (Spain) CPAN (Spain) Swiss Funding Agencies (Switzerland) MST (Taipei) ThEPCenter, (Thailand) IPST, (Thailand) STAR (Thailand) NSTDA (Thailand) TUBITAK (Turkey) TAEK (Turkey) NASU (Ukraine) SFFR (Ukraine) STFC (United Kingdom) DOE (U.S.A.) NSF (U.S.A.) Marie-Curie program European Research Council EPLANET (European Union) Leventis Foundation A. P. Sloan Foundation Alexander von Humboldt Foundation Belgian Federal Science Policy Office Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium) Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium) Ministry of Education, Youth and Sports (MEYS) of the Czech Republic Council of Science and Industrial Research, India HOMING PLUS program of the Foundation for Polish Science European Union Regional Development Fund Compagnia di San Paolo (Torino) Consorzio per la Fisica (Trieste) MIUR (Italy) Thalis program Aristeia program EU-ESF Greek NSRF National Priorities Research Program by Qatar National Research Fund Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Science and Technology Facilities Council A search for pair production of neutral color-octet weak-triplet scalar particles (Theta(0)) is performed in processes where one Theta(0) 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 root 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 Theta(0) mass. The 95% confidence level lower bounds on the Theta(0) 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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Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at root s=8TeV

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