The origin of proton mass from J/psi photo-production data

doi:10.1140/epjc/s10052-020-8057-9

	The origin of proton mass from J/psi photo-production data
	Wang, Rong 1,3; Chen, Xurong 1,2; Evslin, Jarah 1,3
刊名	EUROPEAN PHYSICAL JOURNAL C
	2020-06-06
卷号	80 期号:6 页码:6
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-020-8057-9
通讯作者	Chen, Xurong(xchen@impcas.ac.cn)
英文摘要	The trace of the stress tensor characterizes the transformation of a theory under rescaling. In quantum chromodynamics (QCD), this trace contains contributions from the bare masses of the quarks and also from a purely quantum effect, called the QCD trace anomaly. It affects all masses in the theory. We present an estimation of the QCD trace anomaly from the near-threshold J/psi photo-production data of the GlueX experiment, at JLab. We apply a vector meson dominance model to describe the photo-production of J/psi and a running strong coupling which includes the nonperturbative effects in the low mu 2 region. Despite the large uncertainty, we find that the experimental data favors a small value of the trace anomaly parameter b=0.07 +/- 0.17. We report the resulting proton mass decompositions at mu 2=0.41GeV(2) and mu 2=4GeV(2).
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB34030301] ; CAS Key Research Program of Frontier Sciences[QYZDY-SSW-SLH006] ; NSFC MianShang Grants[11875296] ; NSFC MianShang Grants[11675223] ; Recruitment Program of High-end Foreign Experts
WOS关键词	NUCLEON
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000540452000001
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; CAS Key Research Program of Frontier Sciences ; NSFC MianShang Grants ; Recruitment Program of High-end Foreign Experts
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140409]
专题	中国科学院近代物理研究所
通讯作者	Chen, Xurong
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.South China Normal Univ, Guangdong Prov Key Lab Nucl Sci, Inst Quantum Matter, Guangzhou 510006, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rong,Chen, Xurong,Evslin, Jarah. The origin of proton mass from J/psi photo-production data[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(6):6.
APA	Wang, Rong,Chen, Xurong,&Evslin, Jarah.(2020).The origin of proton mass from J/psi photo-production data.EUROPEAN PHYSICAL JOURNAL C,80(6),6.
MLA	Wang, Rong,et al."The origin of proton mass from J/psi photo-production data".EUROPEAN PHYSICAL JOURNAL C 80.6(2020):6.