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Extraction of the proton mass radius from the vector meson photoproductions near thresholds

文献类型：期刊论文

作者Wang, Rong1,2; Kou, Wei1,2; Xie, Ya-Ping1,2; Chen, Xurong1,2,3
刊名PHYSICAL REVIEW D
出版日期2021-05-11
卷号103期号:9页码:5
ISSN号2470-0010
DOI10.1103/PhysRevD.103.L091501
通讯作者Wang, Rong(rwang@impcas.ac.cn) ; Kou, Wei(kouwei@impcas.ac.cn) ; Xie, Ya-Ping(xieyaping@impcas.ac.cn) ; Chen, Xurong(xchen@impcas.ac.cn)
英文摘要We present an analysis of the proton mass radius by studying the t dependence of the differential cross sections of the vector meson photoproductions near the thresholds. At low energy, the photoproduction of a quarkonium off the proton is connected to the scalar gravitational form factor of the proton, which is sensitive to the proton mass distribution from the quantum chromodynamics trace anomaly. Under an assumption of the scalar form factor of dipole form, the proton mass radius is extracted via the nearthreshold photoproduction data of J/psi, phi, and omega vector mesons. The average value of the proton mass radius is estimated to be root < R-m(2)> = 0.67 +/- 0.03 fm, with the dipole cutoff m(s) = 1.01 +/- 0.04 GeV.
WOS关键词GENERALIZED PARTON DISTRIBUTIONS ; ENERGY-MOMENTUM TENSOR ; FORM-FACTORS ; NUCLEON
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB34030301] ; National Natural Science Foundation of China[12005266]
WOS研究方向Astronomy & Astrophysics ; Physics
语种英语
WOS记录号WOS:000649439500009
出版者AMER PHYSICAL SOC
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://119.78.100.186/handle/113462/137322]  
专题中国科学院近代物理研究所
通讯作者Wang, Rong; Kou, Wei; Xie, Ya-Ping; Chen, Xurong
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
3.South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Rong,Kou, Wei,Xie, Ya-Ping,et al. Extraction of the proton mass radius from the vector meson photoproductions near thresholds[J]. PHYSICAL REVIEW D,2021,103(9):5.
APA Wang, Rong,Kou, Wei,Xie, Ya-Ping,&Chen, Xurong.(2021).Extraction of the proton mass radius from the vector meson photoproductions near thresholds.PHYSICAL REVIEW D,103(9),5.
MLA Wang, Rong,et al."Extraction of the proton mass radius from the vector meson photoproductions near thresholds".PHYSICAL REVIEW D 103.9(2021):5.

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来源：近代物理研究所

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