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dc.creatorChatrchyan, S.
dc.creatorAdžić, Petar
dc.creatorĐorđević, Miloš
dc.creatorEkmedzic, M.
dc.creatorKrpic, D.
dc.creatorMilošević, Jovan
dc.creatorMilenović, Predrag
dc.creatorRekovic, V.
dc.date.accessioned2018-03-01T23:00:25Z
dc.date.available2018-03-01T23:00:25Z
dc.date.issued2012
dc.identifier.issn1550-7998 (print)
dc.identifier.issn1550-2368 (electronic)
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/5205
dc.description.abstractResults are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 fb(-1) recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the fourth-generation quarks and the relevant Cabibbo-Kobayashi-Maskawa matrix elements are derived in the context of a simple extension of the standard model with a sequential fourth generation of fermions. The existence of mass-degenerate fourth-generation quarks with masses below 685 GeV is excluded at 95% confidence level for minimal off-diagonal mixing between the third- and the fourth-generation quarks. With a mass difference of 25 GeV between the quark masses, the obtained limit on the masses of the fourth-generation quarks shifts by about +/- 20 GeV. These results significantly reduce the allowed parameter space for a fourth generation of fermions. DOI: 10.1103/PhysRevD.86.112003en
dc.relationBMWF (Austria), FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq, (Brazil), CAPES, (Brazil), FAPERJ, (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN, CAS, (China), MoST, (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), RPF (Cyprus), MoER (Estonia) [SF0690030s09], ERDF (Estonia), Academy of Finland, MEC, (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG, (Germany), HGF(Germany), GSRT (Greece), OTKA (Hungary), NKTH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), NRF (Korea), WCU (Korea), LAS (Lithuania), CINVESTAV, (Mexico), CONACYT, (Mexico), SEP, (Mexico), UASLP-FAI (Mexico), MSI (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan), MON, (Russia), RosAtom, (Russia), RAS (Russia), RFBR (Russia), MSTD (Serbia), SEIDI (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), NSC (Taipei), ThEP, (Thailand), IPST (Thailand), NECTEC (Thailand), TUBITAK (Turkey), TAEK (Turkey), NASU (Ukraine), STFC (United Kingdom), DOE (USA), NSF (USA), Marie-Curie program, European Research Council (European Union), Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation, Austrian Science Fund (FWF), Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture (FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of Czech Republic, Council of Science and Industrial Research, India, Compagnia di San Paolo (Torino), HOMING PLUS program of Foundation for Polish Science, European Union, Regional Development Fund
dc.rightsopenAccessen
dc.sourcePhysical Review Den
dc.titleCombined search for the quarks of a sequential fourth generationen
dc.typearticleen
dcterms.abstractЕкмедзиц, М.; Рековиц, В.; Крпиц, Д.; Aдзиц, П.; Цхатрцхyан, С.; Миленовић Предраг; Милошевић Јован; Ђорђевић Милош;
dc.citation.volume86
dc.citation.issue11
dc.identifier.wos000312294500001
dc.identifier.doi10.1103/PhysRevD.86.112003
dc.citation.otherArticle Number: 112003
dc.citation.rankM21
dc.contributor.countCMS Collaboration (ukupan broj autora: 2204)
dc.identifier.scopus2-s2.0-84871203513
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs//bitstream/id/13243/5201.pdf


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