Published June 10, 2016
| Published + Submitted
Journal Article
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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
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).
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.Attached Files
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Submitted - 1507.07527v2.pdf
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Additional details
- Eprint ID
- 68660
- Resolver ID
- CaltechAUTHORS:20160624-114206724
- SCOAP3
- Bundesministerium für Wissenschaft, Forschung und Wirtschaft (BMWFW)
- Austrian Science Fund (FWF)
- Fonds de la Recherche Scientifique (FNRS)
- Fonds Voor Wetenschappelijk Onderzoek (FWO)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)
- Ministry of Education and Science (Bulgaria)
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology (China)
- National Natural Science Foundation of China
- COLCIENCIAS (Colombia)
- Croatian Ministry of Science, Education and Sport
- Croatian Science Foundation
- Research Promotion Foundation, Cyprus
- Ministry of Education and Research
- Estonian Research Council
- European Regional Development Fund, Estonia
- Academy of Finland
- Ministry of Education and Culture (Finland)
- Helsinki Institute of Physics
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA) France
- Centre National de la Recherche Scientifique (CNRS)
- Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
- Bundesministerium für Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
- General Secretariat for Research and Technology (GSRT)
- Hungarian National Scientific Research Fund (OTKA)
- NIH (Hungary)
- Ministry of Science, ICT and Future Planning (Korea)
- National Research Foundation of Korea
- Lithuanian Academy of Sciences
- Ministry of Education (Malaysia)
- Universiti Malaya (Malaya University, Malaysia)
- CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico)
- Ministry of Business, Innovation and Employment, New Zealand
- Pakistan Atomic Energy Commission
- Ministry of Science and Higher Education (Poland)
- Fundação para a Ciência e a Tecnologia (FCT)
- Joint Institute for Nuclear Research (JINR)
- MON
- RosAtom
- Russian Academy of Sciences
- Russian Foundation for Basic Research
- Ministry of Education, Science and Technological Development (Serbia)
- SEIDI and CPAN (Spain)
- Swiss Funding Agencies (Switzerland)
- Ministry of Science and Technology (Taipei)
- ThEPCenter, IPST, STAR, and NSTDA (Thailand)
- Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)
- Türkiye Atom Enerjisi Kurumu (TAEK)
- National Academy of Sciences of Ukraine
- State Fund for Fundamental Researches, Ukraine
- Science and Technology Facilities Council (STFC)
- Department of Energy (DOE)
- NSF
- Marie-Curie IEF program (European Union)
- European Research Council (ERC)
- EPLANET
- Leventis Foundation
- Alfred P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office (BELSPO)
- Fonds pour la Formation à la Recherche dans l'índustrie et dans l'Ágriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
- Council of Science and Industrial Research (India)
- HOMING PLUS programme of Foundation for Polish Science
- European Regional Development Fund
- Compagnia di San Paolo (Torino)
- Consorzio per la Fisica (Trieste)
- 20108T4XTM
- Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)
- Thalis programme
- Greek National Strategic Reference Framework (NSRF)
- Qatar National Research Fund National Priorities Research Program
- Rachadapisek Sompot Fund for Postdoctoral Fellowship Chulalongkorn University (Thailand)
- Welch Foundation
- Aristeia programme
- European Social Fund
- Created
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2016-06-26Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field