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

文献类型：期刊论文

作者Wang, Rong1,3; Chen, Xurong1,2; Evslin, Jarah1,3
刊名EUROPEAN PHYSICAL JOURNAL C
出版日期2020-06-06
卷号80期号:6页码:6
ISSN号1434-6044
DOI10.1140/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).
WOS关键词NUCLEON
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研究方向Physics
语种英语
WOS记录号WOS:000540452000001
出版者SPRINGER
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
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.

入库方式： OAI收割

来源：近代物理研究所

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