First direct measurement of the absolute branching fraction of ?+ ? ?e+?e

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dc.authoridZhang, Jiawei/0000-0001-9635-154X
dc.authoridYu, Binxing/0000-0002-9231-3543
dc.authoridYang, Jing/0009-0004-8274-9863
dc.authoridchen, bin/0000-0002-3398-1314
dc.authoriddai, jianping/0000-0003-4802-4485
dc.authoridMesschendorp, Johan/0000-0001-6649-0549
dc.authoridCalligaris, Luigi/0000-0002-9951-9448
dc.authorwosidzhang, zheng/KHY-8870-2024
dc.authorwosidWang, Han/JJF-2614-2023
dc.authorwosidLi, Shuyao/JRY-8603-2023
dc.authorwosidqin, cheng/KHC-3344-2024
dc.authorwosidxie, jing/KDO-9486-2024
dc.authorwosidLI, LIXIN/KFS-0074-2024
dc.authorwosidLiu, Jie/JCP-1070-2023
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAliberti, R.
dc.contributor.authorAmoroso, A.
dc.contributor.authorAn, M. R.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-19T14:50:47Z
dc.date.available2024-05-19T14:50:47Z
dc.date.issued2023
dc.departmentİstinye Üniversitesien_US
dc.description.abstractThe first direct measurement of the absolute branching fraction of Sigma(+) -> Lambda e(+)nu(e) is reported based on an e(+) e(-) annihilation sample of (10087 +/- 44) x 10(6) J/psi events collected with the BESIII detector at root s = 3.097 GeV. The branching fraction is determined to be B(Sigma(+)-> Lambda e(+)nu(e))=2.93 +/- 0.74 (stat) +/- 0.13(syst)] x 10(-5), which is the most precise measurement obtained in a single experiment to date and also the first result obtained at a collider experiment. Combining this result with the world average of B(Sigma(-)-> Lambda e(-) (nu) over bar (e). and the lifetimes of Sigma(+/-), the ratio, Gamma (Sigma(-) ->Lambda e(-) (nu) over bar (e) /Sigma(+) -> Lambda e(+) (nu) over bar (e), is determined to be 1.06 +/- 0.28, which is within 1.8 standard deviations of the value expected in the absence of second-class currents.en_US
dc.description.sponsorshipIHEP computing center; National Key R&D Program of China [2020YFA0406300, 12192265, 12165022]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC; CAS [U1832121, U1832207]; CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040]; 100 Talents Program of CAS; Institute of Nuclear and Particle Physics (INPAC); Shanghai Key Laboratory for Particle Physics and Cosmology; Yunnan Fundamental Research Project [202301AT070162]; ERC [758462]; European Union [894790]; German Research Foundation DFG [443159800, 455635585, CRC 1044, FOR5327, GRK 2149]; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey [DPT2006K-120470]; National Science and Technology fund; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B16F640076]; Olle Engkvist Foundation [200-0605]; Polish National Science Centre [2019/35/O/ST2/02907]; Suranaree University of Technology (SUT) , Thailand Science Research and Innovation (TSRI); National Science Research and Innovation Fund (NSRF) [160355]; Royal Society, UK [DH140054, DH160214]; Swedish Research Council; U.S. Department of Energy [DE-FG02-05ER41374]en_US
dc.description.sponsorshipThe BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. The authors thank Prof. Ru-Min Wang for helpful discussions. This work is supported in part by National Key R&D Program of China under Contracts No. 2020YFA0406300,No. 12192265; No. 12165022; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP) ; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832121, No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003, No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (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's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie Grant Agreement No. 894790; German Research Foundation DFG under Contracts No. 443159800, No. 455635585, Collaborative Research Center CRC 1044, FOR5327, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation under Contract No. B16F640076; Olle Engkvist Foundation under Contract No. 200-0605; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; STFC (United Kingdom) ; Suranaree University of Technology (SUT) , Thailand Science Research and Innovation (TSRI) , and National Science Research and Innovation Fund (NSRF) under Contract No. 160355; The Royal Society, UK under Contracts No. DH140054, No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.en_US
dc.identifier.doi10.1103/PhysRevD.107.072010
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-85158844031en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org10.1103/PhysRevD.107.072010
dc.identifier.urihttps://hdl.handle.net/20.500.12713/5806
dc.identifier.volume107en_US
dc.identifier.wosWOS:000999229700012en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
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.snmz20240519_kaen_US
dc.subjectBeta-Decayen_US
dc.subjectWeak Magnetismen_US
dc.subject2nd-Classen_US
dc.titleFirst direct measurement of the absolute branching fraction of ?+ ? ?e+?een_US
dc.typeArticleen_US

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