Measurements of the Electric and Magnetic Form Factors of the Neutron for Timelike Momentum Transfer

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dc.authoridLi, Xiaoyu/0000-0001-8017-207X
dc.authoridYu, Binxing/0000-0002-9231-3543
dc.authoridChen, Qi/0000-0002-6568-7267
dc.authoridWang, Ling/0000-0003-0272-2974
dc.authoridli, fangyu/0009-0009-8303-9157
dc.authoriddai, jianping/0000-0003-4802-4485
dc.authoridWang, Ling/0000-0003-0272-2974
dc.authorwosidLiu, Cunming Dr./K-2976-2014
dc.authorwosidzhen, li/KGK-6604-2024
dc.authorwosidchen, xu/JNT-3068-2023
dc.authorwosidchen, zhuo/JXX-1337-2024
dc.authorwosidchen, yue/JXW-9556-2024
dc.authorwosidLi, Xiaoyu/HSE-9827-2023
dc.authorwosidZhou, Hong/JKJ-1067-2023
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAliberti, R.
dc.contributor.authorAmoroso, A. A. C.
dc.contributor.authorAn, M. R.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-19T14:51:00Z
dc.date.available2024-05-19T14:51:00Z
dc.date.issued2023
dc.departmentİstinye Üniversitesien_US
dc.description.abstractWe present the first measurements of the electric and magnetic form factors of the neutron in the timelike (positive q2) region as function of four-momentum transfer. We explored the differential cross sections of the reaction e+e- -> n over bar n with data collected with the BESIII detector at the BEPCII accelerator, corresponding to an integrated luminosity of 354.6 pb-1 in total at twelve center-of-mass energies ffiffibetweenps = 2.0-2.95 GeV. A relative ffiffiuncertainty of 18% and 12% for the electric and magnetic form factors, respectively, is achieved at ps= 2.3935 GeV. Our results are comparable in accuracy to those from electron scattering in the comparable spacelike region of four-momentum transfer. The electromag-netic form factor ratio Rem equivalent to IGEI=IGMI is within the uncertainties close to unity. We compare our result on IGEI and IGMI to recent model predictions, and the measurements in the spacelike region to test the analyticity of electromagnetic form factors.en_US
dc.description.sponsorshipIHEP computing center; National Key R&D Program of China [2020YFA0406400]; 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 [U1832207]; CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040]; 100 Talents Program of CAS; Guangdong Major Project of Basic and Applied Basic Research [2020B0301030008]; Science and Technology Program of Guangzhou [2019050001]; Double First-Class university project foundation of USTC; Institute of Nuclear and Particle Physics (INPAC); Shanghai Key Laboratory for Particle Physics and Cosmology; 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 Research Foundation of Korea [NRF-2022R1A2C1092335]; National Science and Technology fund; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources and Institutional Development, Research and Innovation [B16F640076]; 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 [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. This work is supported in part by the National Key R & D Program of China under Contracts No. 2020YFA0406400,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, No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; Guangdong Major Project of Basic and Applied Basic Research No. 2020B0301030008; Science and Technology Program of Guangzhou (No. 2019050001) ; The Double First-Class university project foundation of USTC; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790; German Research Foundation DFG under Contracts Nos. 443159800, 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 Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources and Institutional Development, Research and Innovation under Contract No. B16F640076; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; 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 Contract No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.en_US
dc.identifier.doi10.1103/PhysRevLett.130.151905
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.issue15en_US
dc.identifier.pmid37115883en_US
dc.identifier.scopus2-s2.0-85153779550en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org10.1103/PhysRevLett.130.151905
dc.identifier.urihttps://hdl.handle.net/20.500.12713/5856
dc.identifier.volume130en_US
dc.identifier.wosWOS:000987465400004en_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 Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmz20240519_kaen_US
dc.subjectDispersion-Theoretical Analysisen_US
dc.subjectAnnihilationen_US
dc.subjectScatteringen_US
dc.subjectCollideren_US
dc.titleMeasurements of the Electric and Magnetic Form Factors of the Neutron for Timelike Momentum Transferen_US
dc.typeArticleen_US

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