| dc.contributor.author | Chatrchyan, Seguei | |
| dc.contributor.author | Brochero Cifuentes, Javier Andrés | |
| dc.contributor.author | Cabrillo Bartolomé, José Iban | |
| dc.contributor.author | Calderón Tazón, Alicia | |
| dc.contributor.author | Chuang, S. H. | |
| dc.contributor.author | Duarte Campderros, Jorge | |
| dc.contributor.author | Felcini, Marta | |
| dc.contributor.author | Fernández García, Marcos | |
| dc.contributor.author | Gómez Gramuglio, Gervasio | |
| dc.contributor.author | González Sánchez, Francisco Javier | |
| dc.contributor.author | Jordá Lope, Clara | |
| dc.contributor.author | Lobelle Pardo, Patricia | |
| dc.contributor.author | López Virto, María Amparo | |
| dc.contributor.author | Marco de Lucas, Jesús | |
| dc.contributor.author | Marco de Lucas, Rafael José | |
| dc.contributor.author | Martínez Rivero, Celso | |
| dc.contributor.author | Matorras Weinig, Francisco | |
| dc.contributor.author | Muñoz Sánchez, Francisca Javiela | |
| dc.contributor.author | Piedra Gómez, Jonatan | |
| dc.contributor.author | Rodrigo Anoro, Teresa | |
| dc.contributor.author | Rodríguez Marrero, Ana Yaiza | |
| dc.contributor.other | Universidad de Cantabria | es_ES |
| dc.date.accessioned | 2022-12-16T09:44:54Z | |
| dc.date.available | 2022-12-16T09:44:54Z | |
| dc.date.issued | 2011 | |
| dc.identifier.issn | 1126-6708 | |
| dc.identifier.issn | 1029-8479 | |
| dc.identifier.uri | https://hdl.handle.net/10902/26914 | |
| dc.description.abstract | An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb-1. This analysis is motivated by recent studies of pp ̅ →tt ̅ reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z’). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp ̅ collisions. Limits are set as a function of the Z’ mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results. | es_ES |
| dc.description.sponsorship | We thank Johan Alwall, Ed Berger, Qing-Hong Cao, Chuan-Ren Chen, Chong-Sheng Li and Hao Zhang for discussions and help in implementing the Z0 model in Mad- Graph/MadEvent. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative sta_ 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); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, 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); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA). | es_ES |
| dc.format.extent | 27 p. | es_ES |
| dc.language.iso | eng | es_ES |
| dc.publisher | Springer Verlag | es_ES |
| dc.rights | Attribution-NonCommercial 4.0 International ©CERN, for the benefit of the CMS Collaboration | es_ES |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | * |
| dc.source | Journal of High Energy Physics, 2011, 5 | es_ES |
| dc.subject.other | Hadron-Hadron Scattering | es_ES |
| dc.title | Search for same-sign top-quark pair production at √s=7 TeV and limits on flavour changing neutral currents in the top sector. | es_ES |
| dc.type | info:eu-repo/semantics/article | es_ES |
| dc.rights.accessRights | openAccess | es_ES |
| dc.identifier.DOI | 10.1007/JHEP08(2011)005 | |
| dc.type.version | publishedVersion | es_ES |
Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial 4.0 International ©CERN, for the benefit of the CMS Collaboration
