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Search for anomalous tt¯ production in the highly-boosted all-hadronic final stat

dc.contributor.authorChatrchyan, S.
dc.contributor.authorBrochero Cifuentes, Javier Andrés 
dc.contributor.authorCabrillo Bartolomé, José Iban 
dc.contributor.authorCalderón Tazón, Alicia 
dc.contributor.authorChuang, S. H.
dc.contributor.authorDuarte Campderros, Jorge 
dc.contributor.authorFelcini, Marta
dc.contributor.authorFernández García, Marcos 
dc.contributor.authorGómez Gramuglio, Gervasio 
dc.contributor.authorGonzález Sánchez, Francisco Javier 
dc.contributor.authorJordá Lope, Clara
dc.contributor.authorLobelle Pardo, Patricia
dc.contributor.authorLópez Virto, María Amparo
dc.contributor.authorMarco de Lucas, Jesús 
dc.contributor.authorMarco de Lucas, Rafael José
dc.contributor.authorMartínez Rivero, Celso
dc.contributor.authorMatorras Weinig, Francisco 
dc.contributor.authorMuñoz Sánchez, Francisca Javiela
dc.contributor.authorRodrigo Anoro, Teresa 
dc.contributor.authorRodríguez Marrero, Ana Yaiza
dc.contributor.authorRuiz Jimeno, Alberto 
dc.contributor.authorScodellaro, Luca 
dc.contributor.authorSobrón Sañudo, Mar
dc.contributor.authorVila Álvarez, Iván  
dc.contributor.authorVilar Cortabitarte, Rocío 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2023-05-17T13:49:55Z
dc.date.available2023-05-17T13:49:55Z
dc.date.issued2012-09
dc.identifier.issn1126-6708
dc.identifier.issn1029-8479
dc.identifier.urihttps://hdl.handle.net/10902/28938
dc.description.abstractA search is presented for a massive particle, generically referred to as a Z?, decaying into a tt¯tt¯ pair. The search focuses on Z? resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 fb?1. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z? modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in tt¯tt¯ production beyond expectations of the standard mode for tt invariant mass larger than 1 TeV/c 2.es_ES
dc.description.sponsorshipWe thank Seung J. Lee for the computations of the Kaluza-Klein gluon cross sections at 7 TeV. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (U.S.A.). This work was supported in part by the DOE under under Task TeV of contract DE-FG02-96ER40956 during the Workshop on Jet Substructure at the University of Washington.es_ES
dc.format.extent41 p.es_ES
dc.language.isoenges_ES
dc.publisherSpringer Verlages_ES
dc.rightsAttribution 4.0 International. ©CERN, for the benefit of the CMS Collaborationes_ES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.sourceJournal of High Energy Physics, 2012, 2012(9), 29es_ES
dc.subject.otherHadron-hadron scatteringes_ES
dc.titleSearch for anomalous tt¯ production in the highly-boosted all-hadronic final states_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherVersionhttps://doi.org/10.1007/JHEP09(2012)029es_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.1007/JHEP09(2012)029
dc.type.versionpublishedVersiones_ES


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