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Measurement of the CP-violating weak phase φ_s and the decay width difference ΔΓ_s using the B^0_s → J/ψφ(1020)decay channel in pp collisions at √s = 8 TeV

Khachatryan, V. and Anderson, D. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Duarte, J. and Mott, A. and Newman, H. B. and Pena, C. and Pierini, M. and Spiropulu, M. and Vlimant, J. R. and Xie, S. and Zhu, R. Y. and Dubinin, M. (2016) Measurement of the CP-violating weak phase φ_s and the decay width difference ΔΓ_s using the B^0_s → J/ψφ(1020)decay channel in pp collisions at √s = 8 TeV. Physics Letters B, 757 . pp. 97-120. ISSN 0370-2693. http://resolver.caltech.edu/CaltechAUTHORS:20160624-114206724

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Abstract

The CP-violating weak phase ϕ_s of the B^0_s meson and the decay width difference ΔΓ_s of the B^0_s light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of B^0_s → J/ψφ(1020) → µ^+µ^-K^+K^- decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb^(-1) collected in pp collisions at a centre-of-mass energy of 8 TeV. A total of 49 200 reconstructed B^0_s decays are used to extract the values of ϕ_s and ΔΓ_s by performing a time-dependent and flavour-tagged angular analysis of the μ^+μ^−K^+K^− final state. The weak phase is measured to be ϕ_s =-0.075 ± 0.097(stat) ± 0.031(syst) rad, and the decay width difference is ΔΓ_s = 0.095 ± 0.013(stat) ± 0.007(syst) ps^(-1).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.physletb.2016.03.046DOIArticle
http://www.sciencedirect.com/science/article/pii/S037026931630017XPublisherArticle
http://arxiv.org/abs/1507.07527arXivDiscussion Paper
ORCID:
AuthorORCID
Spiropulu, M.0000-0001-8172-7081
Additional Information:© 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 27 July 2015, Revised 11 March 2016, Accepted 16 March 2016, Available online 23 March 2016. We 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); 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, ERCIUT 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); MSIP and NRF (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). 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 à 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 the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund; the Compagnia di San Paolo (Torino); the Consorzio per la Fisica (Trieste); MIUR project 20108T4XTM (Italy); the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand); and the Welch Foundation.
Funders:
Funding AgencyGrant Number
SCOAP3UNSPECIFIED
Bundesministerium für Wissenschaft, Forschung und Wirtschaft (BMWFW)UNSPECIFIED
Austrian Science Fund (FWF)UNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Fonds Voor Wetenschappelijk Onderzoek (FWO)UNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)UNSPECIFIED
Ministry of Education and Science (Bulgaria)UNSPECIFIED
CERNUNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
Ministry of Science and Technology (China)UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
Croatian Ministry of Science, Education and SportUNSPECIFIED
Croatian Science FoundationUNSPECIFIED
Research Promotion Foundation, Cyprus UNSPECIFIED
Ministry of Education and ResearchUNSPECIFIED
Estonian Research Council UNSPECIFIED
European Regional Development Fund, EstoniaUNSPECIFIED
Academy of FinlandUNSPECIFIED
Ministry of Education and Culture (Finland)UNSPECIFIED
Helsinki Institute of PhysicsUNSPECIFIED
Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA) FranceUNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)UNSPECIFIED
General Secretariat for Research and Technology (GSRT)UNSPECIFIED
Hungarian National Scientific Research Fund (OTKA)UNSPECIFIED
NIH (Hungary)UNSPECIFIED
Ministry of Science, ICT and Future Planning (Korea)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Lithuanian Academy of SciencesUNSPECIFIED
Ministry of Education (Malaysia)UNSPECIFIED
Universiti Malaya (Malaya University, Malaysia)UNSPECIFIED
CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico)UNSPECIFIED
Ministry of Business, Innovation and Employment, New ZealandUNSPECIFIED
Pakistan Atomic Energy CommissionUNSPECIFIED
Ministry of Science and Higher Education (Poland)UNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Joint Institute for Nuclear Research (JINR)UNSPECIFIED
MONUNSPECIFIED
RosAtom UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Education, Science and Technological Development (Serbia)UNSPECIFIED
SEIDI and CPAN (Spain)UNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
Ministry of Science and Technology (Taipei)UNSPECIFIED
ThEPCenter, IPST, STAR, and NSTDA (Thailand)UNSPECIFIED
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)UNSPECIFIED
Türkiye Atom Enerjisi Kurumu (TAEK)UNSPECIFIED
National Academy of Sciences of UkraineUNSPECIFIED
State Fund for Fundamental Researches, UkraineUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie-Curie IEF program (European Union)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
EPLANETUNSPECIFIED
Leventis Foundation UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Belgian Federal Science Policy Office (BELSPO)UNSPECIFIED
Fonds pour la Formation à la Recherche dans l’índustrie et dans l’Ágriculture (FRIA-Belgium)UNSPECIFIED
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)UNSPECIFIED
Ministry of Education, Youth and Sports (MEYS) of the Czech RepublicUNSPECIFIED
Council of Science and Industrial Research (India)UNSPECIFIED
HOMING PLUS programme of Foundation for Polish Science UNSPECIFIED
European Regional Development FundUNSPECIFIED
Compagnia di San Paolo (Torino)UNSPECIFIED
Consorzio per la Fisica (Trieste)UNSPECIFIED
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)20108T4XTM
Thalis programmeUNSPECIFIED
Greek National Strategic Reference Framework (NSRF)UNSPECIFIED
Qatar National Research Fund National Priorities Research ProgramUNSPECIFIED
Rachadapisek Sompot Fund for Postdoctoral Fellowship Chulalongkorn University (Thailand)UNSPECIFIED
Welch FoundationUNSPECIFIED
Aristeia programmeUNSPECIFIED
European Social FundUNSPECIFIED
Subject Keywords:CMS; Physics; B-physics; CP violation
Record Number:CaltechAUTHORS:20160624-114206724
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160624-114206724
Official Citation:Measurement of the CP-violating weak phase ϕs and the decay width difference ΔΓs using the decay channel in pp collisions at, Physics Letters B, Volume 757, 10 June 2016, Pages 97-120, ISSN 0370-2693, http://dx.doi.org/10.1016/j.physletb.2016.03.046. (http://www.sciencedirect.com/science/article/pii/S037026931630017X)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68660
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Jun 2016 12:00
Last Modified:26 Jun 2016 12:00

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