Hidden-charm pentaquarks with color-octet substructure in QCD sum rules

doi:10.1103/PhysRevD.101.014002

	Hidden-charm pentaquarks with color-octet substructure in QCD sum rules
	Pimikov, Alexandr 1,2; Lee, Hee-Jung 3; Zhang, Pengming 1,4
刊名	PHYSICAL REVIEW D
	2020-01-06
卷号	101 期号:1 页码:16
ISSN号	2470-0010
DOI	10.1103/PhysRevD.101.014002
通讯作者	Pimikov, Alexandr(pimikov@mail.ru)
英文摘要	We study the hidden-charm pentaquark states udsc (c) over bar with spins 1/2, 3/2, and 5/2 within the QCD sum-rule approach. First, we construct the currents for the particular configuration of pentaquark states that consist of the flavor singlet three-quark cluster uds of spins 1/2 and 3/2 and the two-quark cluster ( c) over barc of spin 1, where both clusters arc in a color-octet state. From the QCD sum rules obtained by the operator product expansion up to dimension-10 condensates, the extracted masses for the pentaquark states uds-(c) over barc are about 4.6 GeV (5.6 GeV) for spin 1/2(+/-), about 5.1 GeV (6.0 GeV) for spin 3/2(+/-), about 6.1 GeV (5.9 GeV) for spin 5/2(+/-), where the masses of the positive parity states are given in parentheses. Additionally, based on the flavor singlet pentaquark states, it is also shown that other pentaquark states of clusters like udc-(c) over bars and use-(c) over bard lead to masses similar to the uds-(c) over barc case within error bars. Furthermore, in order to see whether any of the states, observed by the LHCb Collaboration, could be understood as the pentaquark of two clusters in the color-octet state, we study the pentaquark formed by the two clusters udc-(c) over baru, where the three-quark cluster is assumed to have the same flavor structure as the above uds cluster. We come to the conclusion that if the observed pentaquark will be found to have spin 1/2 and negative parity, then it could be described as a state of two color-octet clusters.
资助项目	National Natural Science Foundation of China[11975320] ; National Key Research and Development Program of China[2016YFE0130800] ; Chinese Academy of Sciences President's International Fellowship Initiative (PIFI)[2019PM0036] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education[2016R1D1A1A09920078] ; Ministry of Education and Science of the Russian Federation[3.6371.2017/8.9] ; Ministry of Education and Science of the Russian Federation[3.6439.2017/8.9]
WOS关键词	BARYON ; RESONANCE ; PARITY ; STATES ; MODEL
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000505988400001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences President's International Fellowship Initiative (PIFI) ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education ; Ministry of Education and Science of the Russian Federation
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/141375]
专题	中国科学院近代物理研究所
通讯作者	Pimikov, Alexandr
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Southern Fed Univ, Res Inst Phys, Rostov Na Donu 344090, Russia 3.Chungbuk Natl Univ, Dept Phys Educ, Cheongju 28644, Chungbuk, South Korea 4.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China
推荐引用方式 GB/T 7714	Pimikov, Alexandr,Lee, Hee-Jung,Zhang, Pengming. Hidden-charm pentaquarks with color-octet substructure in QCD sum rules[J]. PHYSICAL REVIEW D,2020,101(1):16.
APA	Pimikov, Alexandr,Lee, Hee-Jung,&Zhang, Pengming.(2020).Hidden-charm pentaquarks with color-octet substructure in QCD sum rules.PHYSICAL REVIEW D,101(1),16.
MLA	Pimikov, Alexandr,et al."Hidden-charm pentaquarks with color-octet substructure in QCD sum rules".PHYSICAL REVIEW D 101.1(2020):16.