Measurement of the ratio B(t ? Wb)/B(t ? Wq) in pp collisions at ?s=8 TeV

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dc.authoridVoutilainen, Mikko/0000-0002-5200-6477
dc.authoridCalvo Alamillo, Enrique/0000-0002-1100-2963
dc.authoridTytgat, Michael/0000-0002-3990-2074
dc.authoridciocci, maria agnese/0000-0003-0002-5462
dc.authoridKogler, Roman/0000-0002-5336-4399
dc.authoridGamsizkan, Halil/0000-0002-2578-6295
dc.authoridSogut, Kenan/0000-0002-9682-2855
dc.contributor.authorKhachatryan, V.
dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBergauer, T.
dc.contributor.authorDragicevic, M.
dc.contributor.authorThe CMS Collaboration
dc.date.accessioned2025-03-07T20:17:59Z
dc.date.available2025-03-07T20:17:59Z
dc.date.issued2014
dc.departmentÇağ Üniversitesi
dc.description.abstractThe 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 t (t) over bar dilepton final state with proton-proton collision data at root 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 |V-tb| > 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, Gamma(t) = 1.36 +/- 0.02 (stat.)(-0.11)(+0.14) (syst.) GeV. (C) 2014 The Authors. Published by Elsevier B.V.
dc.description.sponsorshipBMWFW (Austria); FWF (Austria); Fonds De La Recherche Scientifique - FNRS and FWO (Belgium); CNPq (Brazil); CAPES (Brazil); FAPERJ (Brazil); FAPESP (Brazil); MES (Bulgaria); CERN (China); CAS (China); MOST (China); NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); CSF (Croatia); RPF (Cyprus); MoER (Estonia) [SF0690030s09]; 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); NRF (Republic of Korea); WCU (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 (USA); NSF (USA); Marie-Curie programme; European Research Council; EPLANET (European Union); Leventis Foundation; Alfred 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 Czech Republic; Council of Science and Industrial Research, India; Compagnia di San Paolo (Torino); HOMING PLUS programme of Foundation For Polish Science - EU, Regional Development Fund; Thalis and Aristeia programmes - EU-ESF; Greek NSRF; Division Of Physics; Direct For Mathematical & Physical Scien [1151640, 0906479, 1120138, 1205960, 1314131] Funding Source: National Science Foundation; Division Of Physics; Direct For Mathematical & Physical Scien [1306040, 1306951] Funding Source: National Science Foundation; STFC [ST/L006340/1, ST/I000410/1, ST/K003542/1, ST/L00609X/1, ST/G502347/1, ST/J004901/1, ST/F007094/1, ST/J005665/1, ST/I505580/1, ST/I005912/1, ST/K001639/1, ST/I002200/1, ST/I505572/1, ST/K003844/1, ST/K001604/1, ST/H00081X/2, ST/L005603/1, ST/F006748/1] Funding Source: UKRI
dc.description.sponsorshipWe congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); Fonds De La Recherche Scientifique - FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MOST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (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 NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA).r Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en 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 HOMING PLUS programme of Foundation For Polish Science, cofinanced by EU, Regional Development Fund; and the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF.
dc.identifier.doi10.1016/j.physletb.2014.06.076
dc.identifier.endpage57
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.scopus2-s2.0-85034975302
dc.identifier.scopusqualityQ1
dc.identifier.startpage33
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2014.06.076
dc.identifier.urihttps://hdl.handle.net/20.500.12507/3128
dc.identifier.volume736
dc.identifier.wosWOS:000341487800007
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPhysics Letters B
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20241226
dc.subjectCMS
dc.subjectTop
dc.subjectCKM
dc.subjectWidth
dc.titleMeasurement of the ratio B(t ? Wb)/B(t ? Wq) in pp collisions at ?s=8 TeV
dc.typeArticle

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