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http://hdl.handle.net/10261/110395
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dc.contributor.author | Chatrchyan, S. | - |
dc.contributor.author | Brochero Cifuentes, J. A. | - |
dc.contributor.author | Cabrillo, I. J. | - |
dc.contributor.author | Calderon, Alicia | - |
dc.contributor.author | Chuang, S. H. | - |
dc.contributor.author | Duarte Campderros, J. | - |
dc.contributor.author | Fernández-García, Marcos | - |
dc.contributor.author | Gómez, Gervasio | - |
dc.contributor.author | González Sánchez, J. | - |
dc.contributor.author | Graziano, A. | - |
dc.contributor.author | López Virto, A. | - |
dc.contributor.author | Marco, Jesús | - |
dc.contributor.author | Marco, Rafael | - |
dc.contributor.author | Martínez-Rivero, Celso | - |
dc.contributor.author | Matorras, Francisco | - |
dc.contributor.author | Muñoz Sánchez, F. J. | - |
dc.contributor.author | Piedra, Jonatan | - |
dc.contributor.author | Rodrigo, Teresa | - |
dc.contributor.author | Rodríguez Marrero, Ana Y. | - |
dc.contributor.author | Ruiz Jimeno, Alberto | - |
dc.contributor.author | Scodellaro, Luca | - |
dc.contributor.author | Vila, Iván | - |
dc.contributor.author | Vilar Cortabitarte, R. | - |
dc.contributor.author | CMS Collaboration | - |
dc.date.accessioned | 2015-02-09T12:52:37Z | - |
dc.date.available | 2015-02-09T12:52:37Z | - |
dc.date.issued | 2014 | - |
dc.identifier | doi: 10.1016/j.physletb.2014.06.076 | - |
dc.identifier | issn: 0370-2693 | - |
dc.identifier.citation | Physics Letters B 736: 33-57 (2014) | - |
dc.identifier.uri | http://hdl.handle.net/10261/110395 | - |
dc.description | Under a Creative Commons license.-- et al. | - |
dc.description.abstract | The ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where the denominator includes the sum over all down-type quarks (q = b, s, d), is measured in the tt- dilepton final state with proton-proton collision data at s=8 TeV from an integrated luminosity of 19.7 fb-1, collected with the CMS detector. In order to quantify the purity of the signal sample, the cross section is measured by fitting the observed jet multiplicity, thereby constraining the signal and background contributions. By counting the number of b jets per event, an unconstrained value of R=1.014±0.003(stat.)±0.032(syst.) is measured, in a good agreement with current precision measurements in electroweak and flavour sectors. A lower limit R>0.955 at the 95% confidence level is obtained after requiring R≤1, and a lower limit on the Cabibbo-Kobayashi-Maskawa matrix element |Vtb| > 0.975 is set at 95% confidence level. The result is combined with a previous CMS measurement of the t-channel single-top-quark cross section to determine the top-quark total decay width, Γt=1.36±0.02(stat.)-0.11+0.14(syst.) GeV. © 2014 Elsevier B.V. | - |
dc.description.sponsorship | We acknowledge support from BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MEYS (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 UASLPFAI (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); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEP, IPST and NECTEC (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET(EuropeanUnion); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dansl’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschapen Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports(MEYS) of Czech Republic; the Council of Science and Industrial Research, India; the Compagnia di San Paolo(Torino); the HOMINGPLUS programme of Foundation for PolishScience, cofinanced by EU,Re-gional Development Fund; and the Thalis and Aristeia programmes cofinanced by EU-ESFand the Greek NSRF. | - |
dc.description.sponsorship | Open Access funded by SCOAP³. | - |
dc.publisher | Elsevier | - |
dc.relation.isversionof | Publisher's version | - |
dc.rights | openAccess | - |
dc.title | Measurement of the ratio B(t→Wb)/B(t→Wq) in pp collisions at √s=8 TeV | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1016/j.physletb.2014.06.076 | - |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.physletb.2014.06.076 | - |
dc.date.updated | 2015-02-09T12:52:37Z | - |
dc.description.version | Peer Reviewed | - |
dc.language.rfc3066 | eng | - |
dc.rights.license | http://creativecommons.org/licenses/by/3.0/ | - |
dc.contributor.funder | SCOAP | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
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Measurement of the ratio B.pdf | 1,44 MB | Adobe PDF | Visualizar/Abrir |
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