6533b829fe1ef96bd12898ff
RESEARCH PRODUCT
Measurement of Proton Electromagnetic Form Factors in e+e−→pp¯ in the Energy Region 2.00–3.08 GeV
M. AblikimM. N. AchasovP. AdlarsonS. AhmedM. AlbrechtM. AlekseevA. AmorosoF. F. AnQ. AnAnitaY. BaiO. BakinaR. Baldini FerroliI. BalossinoY. BanK. BegzsurenJ. V. BennettN. BergerM. BertaniD. BettoniF. BianchiJ. BiernatJ. BlomsI. BoykoR. A. BriereH. CaiX. CaiA. CalcaterraG. F. CaoN. CaoS. A. CetinJ. ChaiJ. F. ChangW. L. ChangG. ChelkovD. Y. ChenG. ChenH. S. ChenJ. ChenM. L. ChenS. J. ChenX. R. ChenY. B. ChenW. ChengG. CibinettoF. CossioX. F. CuiH. L. DaiJ. P. DaiX. C. DaiA. DbeyssiD. DedovichZ. Y. DengA. DenigI. DenysenkoM. DestefanisF. De MoriY. DingC. DongJ. DongL. Y. DongM. Y. DongS. X. DuJ. FangS. S. FangY. FangR. FarinelliL. FavaF. FeldbauerG. FeliciC. Q. FengM. FritschC. D. FuY. FuQ. GaoY. GaoY. GaoY. G. GaoB. GarillonI. GarziaE. M. GersabeckA. GilmanK. GoetzenL. GongW. X. GongW. GradlM. GrecoL. M. GuM. H. GuS. GuY. T. GuC. Y. GuanA. Q. GuoL. B. GuoR. P. GuoY. P. GuoA. GuskovS. HanT. Z. HanX. Q. HaoF. A. HarrisK. L. HeF. H. HeinsiusT. HeldY. K. HengM. HimmelreichY. R. HouZ. L. HouH. M. HuJ. F. HuT. HuY. HuG. S. HuangJ. S. HuangL. Q. HuangX. T. HuangN. HueskenT. HussainW. Ikegami AnderssonW. ImoehlM. IrshadQ. JiQ. P. JiX. B. JiX. L. JiH. L. JiangX. S. JiangX. Y. JiangJ. B. JiaoZ. JiaoD. P. JinS. JinY. JinT. JohanssonN. Kalantar-nayestanakiX. S. KangR. KappertM. KavatsyukB. C. KeI. K. KeshkA. KhoukazP. KieseR. KiuchiR. KliemtL. KochO. B. KolcuB. KopfM. KuemmelM. KuessnerA. KupscM. KurthM. G. KurthW. KühnJ. S. LangeP. LarinL. LavezziH. LeithoffT. LenzC. LiC. H. LiCheng LiD. M. LiF. LiG. LiH. B. LiH. J. LiJ. C. LiKe LiL. K. LiLei LiP. L. LiP. R. LiW. D. LiW. G. LiX. H. LiX. L. LiX. N. LiZ. B. LiZ. Y. LiH. LiangH. LiangY. F. LiangY. T. LiangL. Z. LiaoJ. LibbyC. X. LinD. X. LinB. LiuB. J. LiuC. X. LiuD. LiuD. Y. LiuF. H. LiuFang LiuFeng LiuH. B. LiuH. M. LiuHuanhuan LiuHuihui LiuJ. B. LiuJ. Y. LiuK. LiuK. Y. LiuKe LiuL. LiuL. Y. LiuQ. LiuS. B. LiuT. LiuX. LiuX. Y. LiuY. B. LiuZ. A. LiuZhiqing LiuY. F. LongX. C. LouH. J. LuJ. D. LuJ. G. LuX. L. LuY. LuY. P. LuC. L. LuoM. X. LuoP. W. LuoT. LuoX. L. LuoS. LussoX. R. LyuF. C. MaH. L. MaL. L. MaM. M. MaQ. M. MaR. Q. MaX. N. MaX. X. MaX. Y. MaY. M. MaF. E. MaasM. MaggioraS. MaldanerS. MaldeQ. A. MalikA. MangoniY. J. MaoZ. P. MaoS. MarcelloZ. X. MengJ. G. MesschendorpG. MezzadriJ. MinT. J. MinR. E. MitchellX. H. MoY. J. MoC. Morales MoralesN. Yu. MuchnoiH. MuramatsuA. MustafaS. NakhoulY. NefedovF. NerlingI. B. NikolaevZ. NingS. NisarS. L. NiuS. L. OlsenQ. OuyangS. PacettiY. PanM. PapenbrockA. PathakP. PatteriM. PelizaeusH. P. PengK. PetersJ. PetterssonJ. L. PingR. G. PingA. PitkaR. PolingV. PrasadH. QiM. QiS. QianC. F. QiaoL. Q. QinX. P. QinX. S. QinZ. H. QinJ. F. QiuS. Q. QuK. H. RashidK. RavindranC. F. RedmerM. RichterA. RivettiV. RodinM. RoloG. RongCh. RosnerM. RumpA. SarantsevM. SavriéY. SchelhaasK. SchoenningW. ShanX. Y. ShanM. ShaoC. P. ShenP. X. ShenX. Y. ShenH. Y. ShengH. C. ShiR. S. ShiX. ShiX. D. ShiJ. J. SongQ. Q. SongX. Y. SongS. SosioC. SowaS. SpataroF. F. SuiG. X. SunJ. F. SunL. SunS. S. SunT. SunW. Y. SunX. H. SunY. J. SunY. K. SunY. Z. SunZ. J. SunZ. T. SunY. T. TanC. J. TangG. Y. TangX. TangV. ThorenB. TsedneeI. UmanB. WangB. L. WangC. W. WangD. Y. WangH. P. WangK. WangL. L. WangL. S. WangM. WangM. Z. WangMeng WangP. L. WangW. P. WangX. WangX. F. WangX. L. WangY. D. WangY. WangY. WangY. F. WangY. Q. WangZ. WangZ. G. WangZ. Y. WangZ. Y. WangZongyuan WangT. WeberD. H. WeiP. WeidenkaffF. WeidnerH. W. WenS. P. WenU. WiednerG. WilkinsonM. WolkeJ. F. WuL. H. WuL. J. WuZ. WuL. XiaY. XiaS. Y. XiaoY. J. XiaoZ. J. XiaoY. G. XieY. H. XieT. Y. XingX. A. XiongQ. L. XiuG. F. XuJ. J. XuL. XuQ. J. XuW. XuX. P. XuF. YanL. YanW. B. YanW. C. YanY. H. YanH. J. YangH. X. YangL. YangR. X. YangS. L. YangY. H. YangY. X. YangYifan YangZ. Q. YangZhi YangM. YeM. H. YeJ. H. YinZ. Y. YouB. X. YuC. X. YuG. YuJ. S. YuT. YuC. Z. YuanX. Q. YuanY. YuanC. X. YueA. YuncuA. A. ZafarY. ZengB. X. ZhangB. Y. ZhangC. C. ZhangD. H. ZhangH. H. ZhangH. Y. ZhangJ. ZhangJ. L. ZhangJ. Q. ZhangJ. W. ZhangJ. W. ZhangJ. Y. ZhangJ. Y. ZhangJ. Z. ZhangK. ZhangL. ZhangLei ZhangS. F. ZhangT. J. ZhangX. Y. ZhangY. ZhangY. H. ZhangY. T. ZhangYang ZhangYao ZhangYi ZhangYu ZhangZ. H. ZhangZ. P. ZhangZ. Y. ZhangG. ZhaoJ. ZhaoJ. W. ZhaoJ. Y. ZhaoJ. Z. ZhaoLei ZhaoLing ZhaoM. G. ZhaoQ. ZhaoS. J. ZhaoT. C. ZhaoY. B. ZhaoZ. G. ZhaoA. ZhemchugovB. ZhengJ. P. ZhengY. ZhengY. H. ZhengB. ZhongC. ZhongL. ZhouL. P. ZhouQ. ZhouX. ZhouX. K. ZhouX. R. ZhouXiaoyu ZhouXu ZhouA. N. ZhuJ. ZhuJ. ZhuK. ZhuK. J. ZhuS. H. ZhuW. J. ZhuX. L. ZhuY. C. ZhuY. S. ZhuZ. A. ZhuJ. ZhuangB. S. ZouJ. H. Zousubject
PhysicsQuantum chromodynamicsParticle physicsAnnihilationProtonElectron–positron annihilationGeneral Physics and Astronomy01 natural sciencesHelicitylaw.inventionlaw0103 physical sciencesBorn approximation010306 general physicsColliderEnergy (signal processing)description
The process of e+e−→pp¯ is studied at 22 center-of-mass energy points (s) from 2.00 to 3.08 GeV, exploiting 688.5 pb−1 of data collected with the BESIII detector operating at the BEPCII collider. The Born cross section (σpp¯) of e+e−→pp¯ is measured with the energy-scan technique and it is found to be consistent with previously published data, but with much improved accuracy. In addition, the electromagnetic form-factor ratio (|GE/GM|) and the value of the effective (|Geff|), electric (|GE|), and magnetic (|GM|) form factors are measured by studying the helicity angle of the proton at 16 center-of-mass energy points. |GE/GM| and |GM| are determined with high accuracy, providing uncertainties comparable to data in the spacelike region, and |GE| is measured for the first time. We reach unprecedented accuracy, and precision results in the timelike region provide information to improve our understanding of the proton inner structure and to test theoretical models which depend on nonperturbative quantum chromodynamics.
year | journal | country | edition | language |
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2020-01-28 | Physical Review Letters |