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Accès ouvert déclaré 2023 article

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

13Citations signalées — pas une note de qualité
85Institutions déclarées
17Pays d’affiliation déclarés

Résumé fourni par la source

We present the first measurements of the electric and magnetic form factors of the neutron in the timelike (positive q^{2}) region as function of four-momentum transfer. We explored the differential cross sections of the reaction e^{+}e^{-}→n[over ¯]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 between sqrt[s]=2.0-2.95 GeV. A relative uncertainty of 18% and 12% for the electric and magnetic form factors, respectively, is achieved at sqrt[s]=2.3935 GeV. Our results are comparable in accuracy to those from electron scattering in the comparable spacelike region of four-momentum transfer. The electromagnetic form factor ratio R_{em}≡|G_{E}|/|G_{M}| is within the uncertainties close to unity. We compare our result on |G_{E}| and |G_{M}| to recent model predictions, and the measurements in the spacelike region to test the analyticity of electromagnetic form factors.

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Contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Measurements of the Electric and Magnetic Form Factors of the Neutron for Timelike Momentum Transfer
Date Crossref
14/04/2023
Éditeur
American Physical Society (APS)
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.

Institutions déclarées

Institute of High Energy PhysicsSiberian Branch of the Russian Academy of SciencesBudker Institute of Nuclear PhysicsUppsala UniversityJohannes Gutenberg University MainzHelmholtz Institute MainzUniversity of TurinLiaoning Normal UniversityUniversity of Science and Technology of ChinaSoutheast UniversityJoint Institute for Nuclear ResearchIstituto Nazionale di Fisica Nucleare, Sezione di FerraraPeking UniversityNational Centre for Nuclear ResearchInstitute of Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversity of MünsterCarnegie Mellon UniversityWuhan UniversityUniversity of Chinese Academy of SciencesIstinye UniversityXinyang Normal UniversityNankai UniversitySoochow UniversityNanjing UniversityTsinghua UniversityInstitute of Modern PhysicsJilin UniversityHunan UniversityChung-Ang UniversityRuhr University BochumShandong UniversityYunnan UniversityUniversity of JinanLiaoning UniversityZhengzhou UniversityUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Sun Yat-sen UniversityUniversity of OxfordUniversity of FerraraUniversity of ManchesterGSI Helmholtz Centre for Heavy Ion ResearchGuangxi UniversityHenan University of TechnologyNanjing Normal UniversityShandong Normal UniversityFudan UniversityHenan Normal UniversityUniversity of Hawaiʻi at MānoaUniversity of Hawaii SystemSuranaree University of TechnologySouth China Normal UniversityUniversity of the PunjabIndiana University BloomingtonHangzhou Normal UniversityHuangshan UniversityUniversity of TarapacáUniversity of GroningenChina University of GeosciencesJustus-Liebig-Universität GießenIndian Institute of Technology MadrasQufu Normal UniversityBeijing Institute of Petrochemical TechnologyLanzhou UniversitySichuan UniversityGuangxi Normal UniversityShanxi UniversityCentral China Normal UniversityHenan University of Science and TechnologyUniversity of South ChinaCentral South UniversityZhejiang UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaCOMSATS University IslamabadUniversity of PerugiaHunan Normal UniversityShanxi Normal UniversityNear East UniversityNorth China Electric Power UniversityHebei UniversityUniversity of Science and Technology LiaoningYantai UniversityShanghai Jiao Tong UniversityChina Center of Advanced Science and TechnologyBeihang University

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Sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research

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