Is the existence of a J/psi J/psi bound state plausible?

doi:10.1016/j.scib.2021.09.009

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	Is the existence of a J/psi J/psi bound state plausible?
	Dong, Xiang-Kun ; Baru, Vadim 3,4; Guo, Feng-Kun ; Hanhart, Christoph 1,5; Nefediev, Alexey 6,7; Zou, Bing-Song
刊名	SCIENCE BULLETIN
	2021
卷号	66 期号:24 页码:2462-2470
关键词	DIQUARK-ANTIDIQUARK HEAVY QUARKS STRETCHY=FALSEOVERBAR/MMLMOVER RESONANCES CHARM MODEL LHCB MASS
ISSN号	2095-9273
DOI	10.1016/j.scib.2021.09.009
英文摘要	In a recent measurement LHCb reported pronounced structures in the J/psi J/psi spectrum. One of the various possible explanations of those is that they emerge from non-perturbative interactions of vector charmonia. It is thus important to understand whether it is possible to form a bound state of two charmonia interacting through the exchange of gluons, which hadronise into two pions at the longest distance. In this paper, we demonstrate that, given our current understanding of hadron-hadron interactions, the exchange of correlated light mesons (pions and kaons) is able to provide sizeable attraction to the di-J/psi system, and it is possible for two J/psi mesons to form a bound state. As a side result we find from an analysis of the data for the psi(2S) -> J/psi pi pi transition including both pi pi and K (K) over bar final state interactions an improved value for the psi(2S) -> J/psi transition chromo-electric polarisability: vertical bar alpha psi(2S)J/psi vertical bar = (1.8 +/- 0.1) GeV-3, where the uncertainty also includes the one induced by the final state interaction. (C) 2021 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
学科主题	Science & Technology - Other Topics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27628]
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.NRC Kurchatov Inst, Inst Theoret & Expt Phys, Moscow 117218, Russia 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany 5.Forschungszentrum Julich, Inst Adv Simulat, Inst Kemphys, D-52425 Julich, Germany 6.Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany 7.Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia 8.Moscow Inst Phys & Technol, Moscow 141700, Russia 9.Cent South Univ, Sch Phys, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Dong, Xiang-Kun,Baru, Vadim,Guo, Feng-Kun,et al. Is the existence of a J/psi J/psi bound state plausible?[J]. SCIENCE BULLETIN,2021,66(24):2462-2470.
APA	Dong, Xiang-Kun,Baru, Vadim,Guo, Feng-Kun,Hanhart, Christoph,Nefediev, Alexey,&Zou, Bing-Song.(2021).Is the existence of a J/psi J/psi bound state plausible?.SCIENCE BULLETIN,66(24),2462-2470.
MLA	Dong, Xiang-Kun,et al."Is the existence of a J/psi J/psi bound state plausible?".SCIENCE BULLETIN 66.24(2021):2462-2470.