Measurements of Born cross sections for e+e- ? ?c+ ? ¯ c (2595)-+ c. c. and e+e- ? ?c+ ? ¯ c (2625)-+ c. c. at s =4918.0 and 4950.9 MeV

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dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M.N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAfedulidis, O.
dc.contributor.authorAi, X.C.
dc.contributor.authorAliberti, R.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-19T14:34:38Z
dc.date.available2024-05-19T14:34:38Z
dc.date.issued2024
dc.departmentİstinye Üniversitesien_US
dc.description.abstractUsing e+e- collision data collected with the BESIII detector operating at the BEPCII collider, the Born cross sections of e+e-??c+?¯c(2595)-+c.c. and e+e-??c+?¯c(2625)-+c.c. are measured for the first time at center-of-mass energies of s=4918.0 and 4950.9 MeV. Nonzero cross sections are observed very close to the production threshold. The measured Born cross sections of e+e-??c+?¯c(2625)-+c.c. are about 2-3 times greater than those of e+e-??c+?¯c(2595)-+c.c., providing the similar behavior as semileptonic decays of ?b0, but different behavior from that in the hadronic decays of ?b0. The Born cross sections are 15.6±3.1±0.9 pb and 29.4±3.7±2.7 pb for e+e-??c+?¯c(2595)-+c.c., and are 43.4±4.0±4.1 pb and 76.8±6.5±4.2 pb for e+e-??c+?¯c(2625)-+c.c. at s=4918.0 and 4950.9 MeV, respectively. Based on the polar angle distributions of the ?¯c(2625)- and ?c(2625)+, the form-factor ratios |GE|2+3|GM|2/|GC| are determined for e+e-??c+?¯c(2625)-+c.c. for the first time, which are 5.95±4.07±0.15 and 0.94±0.32±0.02 at s=4918.0 and 4950.9 MeV, respectively. All of these first uncertainties are statistical and second systematic. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.en_US
dc.description.sponsorshipShanghai Key Laboratory for Particle Physics and Cosmology, SKLPPC; Instituto Nazionale di Fisica Nucleare, INFN; Institute of Nuclear and Particle Physics, Shanghai Jiao Tong University, INPAC; Chinese Academy of Sciences, CAS; Vetenskapsrådet, VR; Fundamental Research Funds for the Central Universities; Narodowe Centrum Nauki, NCN: 2019/35/O/ST2/02907; Narodowe Centrum Nauki, NCN; DPT2006K-120470; National Natural Science Foundation of China, NSFC: 12225509, 11961141012, 11835012, 12035009, 12221005, 12035013, 12192263, 11935018, 11735014, 12005311, 12192264, 12192262, 12235017, 12061131003, 12192265, 12192260, 12025502, 12192261, 11635010, 11935016, 11935015; National Natural Science Foundation of China, NSFC; National Key Research and Development Program of China, NKRDPC: 2020YFA0406300, 2020YFA0406400; National Key Research and Development Program of China, NKRDPC; University of Science and Technology of China, USTC: WK2030000053; University of Science and Technology of China, USTC; Key Project of Frontier Science Research of Chinese Academy of Sciences: QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040; Key Project of Frontier Science Research of Chinese Academy of Sciences; National Research Foundation of Korea, NRF: NRF-2022R1A2C1092335; National Research Foundation of Korea, NRF; U.S. Department of Energy, USDOE: DE-FG02-05ER41374; U.S. Department of Energy, USDOE; China Postdoctoral Science Foundation: 2020T130636, 2019M662152; China Postdoctoral Science Foundation; CAS Center for Excellence in Particle Physics, CCEPP: U1832207; CAS Center for Excellence in Particle Physics, CCEPP; B16F640076; Horizon 2020 Framework Programme, H2020: 894790; Horizon 2020 Framework Programme, H2020; Deutsche Forschungsgemeinschaft, DFG: GRK 2149, 455635585, CRC 1044, FOR5327; Deutsche Forschungsgemeinschaft, DFGen_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 R&D Program of China under Contracts No. 2020YFA0406300 and No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11635010, No. 11735014, No. 11835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017 and No. 12005311; China Postdoctoral Science Foundation under Contracts No. 2019M662152, and No. 2020T130636; the Fundamental Research Funds for the Central Universities, University of Science and Technology of China under Contract No. WK2030000053; 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. U1832207; CAS Key Research Program of Frontier Sciences under Contracts No. QYZDJ-SSW-SLH003 and 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; European Union\u2019s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790; German Research Foundation DFG under Contracts No. 455635585, Collaborative Research Center Grants No. CRC 1044, No. FOR5327 and No. GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand under Contract No. B16F640076; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; The Swedish Research Council; and U.S. Department of Energy under Contract No. DE-FG02-05ER41374.en_US
dc.identifier.doi10.1103/PhysRevD.109.L071104
dc.identifier.issn2470-0010
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-85192144604en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.109.L071104
dc.identifier.urihttps://hdl.handle.net/20.500.12713/4527
dc.identifier.volume109en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_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.titleMeasurements of Born cross sections for e+e- ? ?c+ ? ¯ c (2595)-+ c. c. and e+e- ? ?c+ ? ¯ c (2625)-+ c. c. at s =4918.0 and 4950.9 MeVen_US
dc.typeArticleen_US

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