Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at s=13TeV
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Özet
A search is performed for the rare decay W±→π±γ in proton-proton collisions at s=13TeV. Data corresponding to an integrated luminosity of 137fb−1 were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W±→π±γ decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W±→π±γ signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W±→π±γ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29 +0.52×10−5. © 2021 The Author(s)
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https://rdlopen.rawdatalibrary.net/r/ebyu/13062Resmi atıflarda kullanılan kalıcı adresTam Kayıt
| Alan | Değer | Dil |
|---|---|---|
| dc.contributor.author | Sirunyan, A.M. | |
| dc.contributor.author | Tumasyan, A. | |
| dc.contributor.author | Adam, W. | |
| dc.contributor.author | Ambrogi, F. | |
| dc.contributor.author | Bergauer, T. | |
| dc.contributor.author | Dragicevic, M. | |
| dc.contributor.author | Erö, J. | |
| dc.contributor.author | Escalante Del Valle, A. | |
| dc.contributor.author | Frühwirth, R. | |
| dc.contributor.author | Jeitler, M. | |
| dc.contributor.author | Krammer, N. | |
| dc.contributor.author | Lechner, L. | |
| dc.contributor.author | Liko, D. | |
| dc.contributor.author | Madlener, T. | |
| dc.contributor.author | Mikulec, I. | |
| dc.contributor.author | Pitters, F.M. | |
| dc.contributor.author | Rad, N. | |
| dc.contributor.author | Schieck, J. | |
| dc.contributor.author | Schöfbeck, R. | |
| dc.contributor.author | Spanring, M. | |
| dc.contributor.author | Templ, S. | |
| dc.contributor.author | Waltenberger, W. | |
| dc.contributor.author | Wulz, C.-E. | |
| dc.contributor.author | Zarucki, M. | |
| dc.contributor.author | Chekhovsky, V. | |
| dc.contributor.author | Litomin, A. | |
| dc.contributor.author | Makarenko, V. | |
| dc.contributor.author | Suarez Gonzalez, J. | |
| dc.contributor.author | Darwish, M.R. | |
| dc.contributor.author | De Wolf, E.A. | |
| dc.contributor.author | Di Croce, D. | |
| dc.contributor.author | Janssen, X. | |
| dc.contributor.author | Kello, T. | |
| dc.contributor.author | Lelek, A. | |
| dc.contributor.author | Pieters, M. | |
| dc.contributor.author | Rejeb Sfar, H. | |
| dc.contributor.author | Van Haevermaet, H. | |
| dc.contributor.author | Van Mechelen, P. | |
| dc.contributor.author | Van Putte, S. | |
| dc.contributor.author | Van Remortel, N. | |
| dc.contributor.author | Blekman, F. | |
| dc.contributor.author | Bols, E.S. | |
| dc.contributor.author | Chhibra, S.S. | |
| dc.contributor.author | D'Hondt, J. | |
| dc.contributor.author | De Clercq, J. | |
| dc.contributor.author | Lontkovskyi, D. | |
| dc.contributor.author | Lowette, S. | |
| dc.contributor.author | Marchesini, I. | |
| dc.contributor.author | Moortgat, S. | |
| dc.contributor.author | Morton, A. | |
| dc.date.accessioned | 2026-10-18T20:27:54.401294626Z | |
| dc.date.available | 2026-10-18T20:27:54.401294626Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | A search is performed for the rare decay W±→π±γ in proton-proton collisions at s=13TeV. Data corresponding to an integrated luminosity of 137fb−1 were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W±→π±γ decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W±→π±γ signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W±→π±γ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29 +0.52×10−5. © 2021 The Author(s) | |
| dc.description.sponsorship | Funding text 1: 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 centers 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: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MOST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, ROSATOM, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MoSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, and 765710 (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation \u00E0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the \u201CExcellence of Science \u2013 EOS\u201D \u2013 be.h project n. 30820817; the Beijing Municipal Science & Technology Commission, No. Z191100007219010; The Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG) under Germany's Excellence Strategy \u2013 EXC 2121 \u201CQuantum Universe\u201D \u2013 390833306; the Lend\u00FClet (\u201CMomentum\u201D) Program and the J\u00E1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences, the New National Excellence Program \u00DANKP, the NKFIA research grants 123842, 123959, 124845, 124850, 125105, 128713, 128786, and 129058 (Hungary); the Council of Science and Industrial Research, India; the HOMING PLUS program of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus program of the Ministry of Science and Higher Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the National Priorities Research Program by Qatar National Research Fund; the Ministry of Science and Higher Education, project no. 02.a03.21.0005 (Russia); the Tomsk Polytechnic University Competitiveness Enhancement Program; the Programa Estatal de Fomento de la Investigaci\u00F3n Cient\u00EDfica y T\u00E9cnica de Excelencia Mar\u00EDa de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (USA).; Funding text 2: 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 centers 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: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq , CAPES , FAPERJ , FAPERGS , and FAPESP (Brazil); MES (Bulgaria); CERN ; CAS , MOST , and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER , ERC PUT and ERDF (Estonia); Academy of Finland , MEC , and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF , DFG , and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP , CINVESTAV , CONACYT , LNS , SEP , and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON , ROSATOM , RAS , RFBR , and NRC KI (Russia); MESTD (Serbia); SEIDI , CPAN , PCTI , and FEDER (Spain); MoSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter , IPST , STAR , and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). ; Funding text 3: Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440 , 724704 , 752730 , and 765710 (European Union); the Leventis Foundation ; the A.P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation \u00E0 la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the \u201CExcellence of Science \u2013 EOS\u201D \u2013 be.h project n. 30820817 ; the Beijing Municipal Science & Technology Commission , No. Z191100007219010 ; The Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG) under Germany's Excellence Strategy \u2013 EXC 2121 \u201CQuantum Universe\u201D \u2013 390833306 ; the Lend\u00FClet (\u201CMomentum\u201D) Program and the J\u00E1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences , the New National Excellence Program \u00DANKP , the NKFIA research grants 123842 , 123959 , 124845 , 124850 , 125105 , 128713 , 128786 , and 129058 (Hungary); the Council of Science and Industrial Research , India; the HOMING PLUS program of the Foundation for Polish Science , cofinanced from European Union, Regional Development Fund, the Mobility Plus program of the Ministry of Science and Higher Education , the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428 , Opus 2014/13/B/ST2/02543 , 2014/15/B/ST2/03998 , and 2015/19/B/ST2/02861 , Sonata-bis 2012/07/E/ST2/01406 ; the National Priorities Research Program by Qatar National Research Fund ; the Ministry of Science and Higher Education , project no. 02.a03.21.0005 (Russia); the Tomsk Polytechnic University Competitiveness Enhancement Program ; the Programa Estatal de Fomento de la Investigaci\u00F3n Cient\u00EDfica y T\u00E9cnica de Excelencia Mar\u00EDa de Maeztu , grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias ; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF ; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Kavli Foundation ; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation , contract C-1845 ; and the Weston Havens Foundation (USA). | |
| dc.identifier.doi | 10.1016/j.physletb.2021.136409 | |
| dc.identifier.issn | 0370-2693 | |
| dc.identifier.scopus | 2-s2.0-85111246735 | |
| dc.identifier.startpage | 136409 | |
| dc.identifier.uri | https://rdlopen.rawdatalibrary.net/r/ebyu/13062 | |
| dc.identifier.volume | 819 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier B.V. | |
| dc.relation.ispartof | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.subject | CMS | |
| dc.subject | EWK | |
| dc.subject | Standard model | |
| dc.title | Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at s=13TeV | |
| dc.type | Article | |
| dspace.entity.type | Publication | |
| rdl.citation.scopus | 10 | |
| rdl.oa.status | gold | |
| rdl.source.index | SCOPUS |