期刊
PHYSICS LETTERS B
卷 774, 期 -, 页码 710-714出版社
ELSEVIER
DOI: 10.1016/j.physletb.2017.10.036
关键词
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资金
- Ministerio de Economia, Industria y Competitividad
- EU FEDER [FPA2016-77177, FPA2015-69714-REDT]
- Junta de Castilla y Leon [SA041U16]
- Generalitat Valenciana [PrometeoII/2014/066]
It is shown that standard constituent quark models produce ((c)over-barcqqq) hidden-charm pentaquarks, where c denotes the charmed quark and q a light quark, which lie below the lowest threshold for spontaneous dissociation and thus are stable in the limit where the internal (c)over-barc annihilation is neglected. The binding is a cooperative effect of the chromoelectric and chromomagnetic components of the interaction, and it disappears in the static limit with a pure chromoelectric potential. Their wave function contains color sextet and color octet configurations for the subsystems and can hardly be reduced to a molecular state made of two interacting hadrons. These pentaquark states could be searched for in the experiments having discovered or confirmed the hidden-charm meson and baryon resonances. (c) 2017 The Author(s). Published by Elsevier B.V.
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