Observation of J=? decays to e plus e - e plus e - and e plus e - ? plus ? -

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dc.authoridLane, Jake/0000-0002-5816-9488|Aliberti, Riccardo/0000-0003-3500-4012
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAhmed, S.
dc.contributor.authorAlbrecht, M.
dc.contributor.authorAliberti, R.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-07-18T20:47:10Z
dc.date.available2024-07-18T20:47:10Z
dc.date.issued2024
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractUsing a data sample of 4.481 x 108 psi o3686 thorn events collected with the BESIII detector, we report the first observation of the four-lepton-decays J=psi -> e thorn e-e thorn e- and J=psi -> e thorn e-mu thorn mu- utilizing the process psi o3686 thorn -> pi thorn pi-J=psi. The branching fractions are determined to be 1/25.48 0.31ostat thorn 0.45osyst thorn x 10-5 and 1/23.53 0.22ostat thorn 0.13osyst thorn x 10-5, respectively. The results are consistent with theoretical predictions. No significant signal is observed for J=psi -> mu thorn mu-mu thorn mu-, and an upper limit on the branching fraction is set at 1.6 x 10-6 at the 90% confidence level. A CP asymmetry observable is constructed for the first two channels, which is measured to be o-0.012 0.054 0.010 thorn and o0.062 0.059 0.006 thorn , respectively. No evidence for CP violation is observed in this processen_US
dc.description.sponsorshipIHEP computing center; National Key Research and Development Program of China [2023YFA1606704, 2020YFA0406300, 2020YFA0406400]; National Natural Science Foundation of China (NSFC) [12375092, 11805037, 11975118, 12165022]; Natural Science Foundation of Hunan Province [2020RC3054, 2019JJ30019]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC; CAS [U1832121, U1732263, U1832207]; CAS Key Research Program of Frontier Sciences [QYZDJ-SSWSLH040]; Shanghai Key Laboratory for Particle Physics and Cosmology; Yunnan Fundamental Research Project [202301AT070162]; ERC [758462]; European Union [894790]; German Research Foundation DFG [443159800, CRC 1044, FOR 2359, GRK 214]; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey [DPT2006K120470]; National Science and Technology fund; Olle Engkvist Foundation [200-0605]; STFC (United Kingdom); Knut and Alice Wallenberg Foundation (Sweden) [2016.0157]; Royal Society, UK [DH140054, DH160214]; Swedish Research Council; U.S. Department of Energy [DE-FG02- 05ER41374, DE-SC-0012069]en_US
dc.description.sponsorshipThe BESIII Collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. The authors would like to extend thanks to Professor Xian-Wei Kang for useful discussions and helpful advice. This work is supported in part by National Key Research and Development Program of China under Contracts No. 2023YFA1606704, No. 2020YFA0406300, and No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 12375092, No. 11805037, No. 11975118, and No. 12165022; the Natural Science Foundation of Hunan Province under Contracts No. 2020RC3054 and No. 2019JJ30019; 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. U1832121, No. U1732263, and No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSWSLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; Yunnan Fundamental Research Project under Contract No. 202301AT070162; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Contract No. Marie Sklodowska-Curie Grant agreement No. 894790; German Research Foundation DFG under Contracts No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom) ; The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02- 05ER41374 and No. DE-SC-0012069.en_US
dc.identifier.doi10.1103/PhysRevD.109.052006
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.issue5en_US
dc.identifier.scopus2-s2.0-85188159640en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.109.052006
dc.identifier.urihttps://hdl.handle.net/11411/7706
dc.identifier.volume109en_US
dc.identifier.wosWOS:001202095500010en_US
dc.identifier.wosqualityN/Aen_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.subjectCp Violationen_US
dc.titleObservation of J=? decays to e plus e - e plus e - and e plus e - ? plus ? -en_US
dc.typeArticleen_US

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