期刊
PHYSICS LETTERS B
卷 808, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135609
关键词
CMS; Physics; CKM matrix; Top quark
资金
- FWF
- FNRS
- FWO (Belgium)
- CNPq
- CAPES
- FAPERJ
- FAPERGS
- FAPESP (Brazil)
- MES (Bulgaria)
- MOST
- NSFC (China)
- COLCIENCIAS (Colombia)
- CSF (Croatia)
- SENESCYT (Ecuador)
- MoER, ERC IUT, PUT
- ERDF (Estonia)
- Academy of Finland
- MEC
- CEA
- CNRS/IN2P3 (France)
- BMBF
- DFG
- HGF (Germany)
- GSRT (Greece)
- NKFIA (Hungary)
- DAE
- DST
- IPM
- SFI (Ireland)
- INFN (Italy)
- NRF (Republic of Korea)
- MES (Latvia)
- MOE
- UM (Malaysia)
- BUAP
- CONACYT
- UASLP-FAI (Mexico)
- FCT (Portugal)
- JINR (Dubna)
- RFBR
- MESTD (Serbia)
- SEIDI
- FEDER (Spain)
- Swiss Funding Agencies (Switzerland)
- NSTDA
- TUBITAK
- TAEK
- NASU (Ukraine)
- DOE
- NSF
- Marie-Curie programme
- European Research Council
- Horizon 2020 Grant [675440, 752730, 765710]
- 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)
- FWO (Belgium) under the Excellence of Science - EOS [30820817]
- Beijing Municipal Science & Technology Commission [Z191100007219010]
- Ministry of Education, Youth and Sports(MEYS) of the Czech Republic
- Deutsche Forschungsgemeinschaft (DFG) under Germany's Excellence Strategy [EXC 2121, 390833306]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences [123842, 123959, 124845, 124850, 125105, 128713, 128786, 129058]
- Council of Science and Industrial Research, India
- HOMING PLUS programme of the Foundation for Polish Science
- European Union
- European Regional Development Fund [Harmonia 2014/14/M/ST2/00428, Opus2014/13/B/ST2/02543, 2014/15/B/ST2/03998, 2015/19/B/ST2/02861]
- Sonata-bis [2012/07/E/ST2/01406]
- National Priorities Research Program by Qatar National Research Fund
- Ministry of Science and Education [14, W03.31.0026]
- Tomsk Polytechnic University Competitiveness Enhancement Program [FSWW-2020-0008]
- Programa Estatal de Fomento de la Investigacion Cientifica y Tecnica de Excelencia Maria de Maeztu [MDM-2015-0509]
- Programa Severo Ochoa del Principado de Asturias
- Thalis and Aristeia programmes
- EU-ESF
- Greek NSRF
- Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University
- Kavli Foundation
- Nvidia Corporation
- SuperMicro Corporation
- Welch Foundation [C-1845]
- Weston Havens Foundation (USA)
- STFC [ST/M004775/1, ST/L005603/1, ST/K001639/1, ST/N001273/1, ST/S000739/1, ST/K003542/1, ST/S00078X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/N001273/1, ST/K001639/1, ST/L005603/1, ST/K003542/1, ST/M004775/1] Funding Source: researchfish
The first direct, model-independent measurement is presented of the modulus of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements vertical bar V-tb vertical bar, vertical bar V-td vertical bar, and vertical bar V-ts vertical bar, in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). Processes directly sensitive to these matrix elements are considered at both the production and decay vertices of the top quark. In the standard model hypothesis of CKM unitarity, a lower limit of vertical bar V-tb vertical bar > 0.970 is measured at the 95% confidence level. Several theories beyond the standard model are considered, and by releasing all constraints among the involved parameters, the values vertical bar V-tb vertical bar = 0.988 +/- 0.024, and vertical bar V-td vertical bar(2) + vertical bar V-ts vertical bar(2) = 0.06 +/- 0.06, where the uncertainties include both statistical and systematic components, are measured. (C) 2020 The Author. Published by Elsevier B.V.
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