Gluons in charmoniumlike states

doi:10.1103/PhysRevD.103.094503

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	Gluons in charmoniumlike states
	Sun, Wei ; Chen, Ying 1; Sun, Peng 2; Yang, Yi-Bo
刊名	PHYSICAL REVIEW D
	2021
卷号	103 期号:9 页码:94503
关键词	QCD
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.094503
英文摘要	The mass components of charmoniumlike states are investigated through the decomposition of QCD energy-momentum tensor (EMT) on lattice. The quark mass contribution < H-m > and the momentum fraction < x > of valence charm quark and antiquark are calculated for conventional 1S, 1P, 1D charmonia and the exotic 1(-+) charmoniumlike state, based on the N-f = 2 + 1 gauge configurations generated by the RBC/UKQCD collaboration. It is found that < H-m > is close to each other and around 2.0 to 2.2 GeV for these states, which implies that the mass splittings among these states come almost from the gluon contribution of QCD trace anomaly. The < x > of the 1(-+) state is only around 0.55, while that in conventional charmonia is around 0.7 to 0.8. This difference manifests that the proportion of light quarks and gluons in the 1(-+) charmoniumlike state is significantly larger than conventional states.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27334]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 3.Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 6.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Sun, Wei,Chen, Ying,Sun, Peng,et al. Gluons in charmoniumlike states[J]. PHYSICAL REVIEW D,2021,103(9):94503.
APA	Sun, Wei,Chen, Ying,Sun, Peng,&Yang, Yi-Bo.(2021).Gluons in charmoniumlike states.PHYSICAL REVIEW D,103(9),94503.
MLA	Sun, Wei,et al."Gluons in charmoniumlike states".PHYSICAL REVIEW D 103.9(2021):94503.