Measurement of the branching fraction of and search for a CP-violating asymmetry in ?? ? ?+ ?- e+ e- at BESIII

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dc.authoridZhang, Jiawei/0000-0001-9635-154X|chen, bin/0000-0002-3398-1314|Liu, Liang/0000-0002-6753-925X|Zhemchugov, Alexey/0000-0002-3360-4965|dai, jianping/0000-0003-4802-4485|Gradl, Wolfgang/0000-0002-9974-8320|Song, Weimin/0000-0003-1376-2293|Wu, Xin/0000-0001-7655-389X|Messchendorp, Johan/0000-0001-6649-0549|Lavezzi, Lia/0000-0002-4928-8151|Han, Jian/0000-0002-0647-4050|Mangoni, Alessio/0000-0002-4786-6632|Lin, Fan/0000-0002-7330-3833|Guo, Ruipeng/0000-0002-7195-7315|Yuncu, Alperen/0000-0001-9696-9331|Wang, Yunwen/0009-0008-3083-7799|Farineli, Riccardo/0000-0002-7972-9093|wang, qi/0000-0002-2794-6897|Pathak, Atanu/0000-0001-9861-2942|Kolcu, Onur Bugra/0000-0002-9177-1286|Spataro, Stefano/0000-0001-9601-405X|Sheng, Jin-Huan/0000-0002-2655-6301|Janchiv, Shinebayar/0000-0003-1207-3322|Destefanis, Marco Giovanni Maria/0000-0003-1997-6751|Kliemt, Ralf/0000-0002-6013-3329|Bortone, Alberto/0000-0003-1577-5004|Kuessner, Meike/0000-0002-0028-0490|Lange, Jens Soren/0000-0003-0234-0474|Lane, Jake/0000-0002-5816-9488|Adlarson, Patrik/0000-0001-6280-3851|Johansson, Tord/0000-0002-6945-716X|Cossio, Fabio/0000-0003-0454-3144|Mezzadri, Giulio/0000-0003-0838-9631|Amoroso, Antonio/0000-0002-3095-8610|, tong/0000-0001-7696-1252|Muramatsu, Hajime/0000-0003-0305-4461|Qi, Hongrong/0000-0002-9325-2308|Achasov, Mikhail/0000-0002-9400-8622|Greco, Michela/0000-0002-7299-7829|Khoukaz, Alfons/0000-0001-7108-895X|Schoenning, Karin/0000-0002-3490-9584|BALOSSINO, Ilaria/0000-0001-9646-4042
dc.authorwosidZhang, Li/GWM-7501-2022
dc.authorwosidlin, yuan/JXL-9592-2024
dc.authorwosidgao, yi/HCI-8298-2022
dc.authorwosidliu, qi/KFA-4047-2024
dc.authorwosidzhao, YZ/GXH-6401-2022
dc.authorwosidwang, jiajun/JRW-6032-2023
dc.authorwosidli, yuanyuan/GZA-4435-2022
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAhmed, S.
dc.contributor.authorAlbrecht, M.
dc.contributor.authorAmoroso, A.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-07-18T20:45:44Z
dc.date.available2024-07-18T20:45:44Z
dc.date.issued2021
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractTherare decay eta' -> pi(+) pi(-) e(+) e(-) is studied using a sample of1.3 x 10(9) J/Psi events collected with the BESIII detector at BEPCII in 2009 and 2012. The branching fraction is measured with improved precision to be (2.42 +/- 0.05(stat) +/- 0.08(syst)) x 10(-3). Due to the inclusion of new data, this result supersedes the last BESIII result on this branching fraction. In addition, the CP-violating asymmetry in the angle between the decay planes of the pi(+)pi(-)-pair and the e(+)e(-)-pair is investigated. A measurable value would indicate physics beyond the standard model; the result is A(CP) = (2.9 +/- 3.7(stat) +/- 1.1(syst))%, which is consistent with the standard model expectation of no CP-violation. The precision is comparable to the asymmetry measurement in the K-L(0) -> pi(+) pi(-) e(+) e(-) decay where the observed (14 +/- 2)% effect is driven by a standard model mechanism.en_US
dc.description.sponsorshipNational Key Basic Research Program of China [2015CB856700]; National Natural Science Foundation of China (NSFC) [11625523, 11635010, 11735014, 11675184, 11835012]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; NSFC; CAS [U1532257, U1532258, U1732263, U1832207]; CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040]; 100 Talents Program of CAS; INPAC; German Research Foundation DFG [CRC 1044]; Istituto Nazionale di Fisica Nucleare, Italy; Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) [530-4CDP03]; Ministry of Development of Turkey [DPT2006K120470]; National Science and Technology fund; The Knut and AliceWallenberg Foundation (Sweden) [2016.0157]; The Royal Society, UK [DH160214]; The Swedish Research Council; U.S. Department of Energy [DE-FG0205ER41374, DE-SC-0010118, DE-SC-0012069]; University of Groningen; Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; Olle Engkvist Foundation (Sweden) [200-0605]; Shanghai Key Laboratory for Particle Physics and Cosmologyen_US
dc.description.sponsorshipThe BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; National Natural Science Foundation of China (NSFC) under Contracts No. 11625523, No. 11635010, No. 11735014, No. 11675184; National Natural Science Foundation of China (NSFC) under Contract No. 11835012; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1532257, No. U1532258, No. U1732263, No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003, No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation DFG under Contract No. Collaborative Research Center CRC 1044; Istituto Nazionale di Fisica Nucleare, Italy; Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) under Contract No. 530-4CDP03; Ministry of Development of Turkey under Contract No. DPT2006K120470; National Science and Technology fund; The Knut and AliceWallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contract No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG0205ER41374, No. DE-SC-0010118, No. DE-SC-0012069; University of Groningen (RuG); The Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt and the Olle Engkvist Foundation (Sweden) under Contract No. 200-0605.en_US
dc.identifier.doi10.1103/PhysRevD.103.092005
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-85106959157en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.103.092005
dc.identifier.urihttps://hdl.handle.net/11411/7665
dc.identifier.volume103en_US
dc.identifier.wosWOS:000655870700002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorÇetin, Serkant Ali
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Den_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectEvent Generatorsen_US
dc.titleMeasurement of the branching fraction of and search for a CP-violating asymmetry in ?? ? ?+ ?- e+ e- at BESIII
dc.typeArticle

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