期刊
PHYSICAL REVIEW D
卷 104, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.114021
关键词
-
资金
- Office of Science, U.S. Department of Energy [DE-FG-88ER40388]
- Polish National Science Centre (NCN) [UMO-2017/27/B/ST2/01139]
In this study, the researchers revisit the three nonstrange pentaquarks predicted using holographic dual description, showing that in the heavy quark limit, the pentaquarks with internal heavy quark spin are all degenerate. The holographic pentaquarks are dual to an instanton bound to heavy mesons in bulk, without the shortcomings related to the nature of the interaction and the choice of the hard core inherent to the molecular constructions. Additionally, the study explicitly derived spin-spin and spin-orbit couplings arising from next to leading order in heavy quark mass to lift the internal spin degeneracy.
We revisit the three nonstrange pentaquarks [1/2 1/2(-)](S=0,1) and [1/2 3/2(-)](S=1) predicted using the holographic dual 2 2 2 2 description, where chiral and heavy quark symmetry are manifest in the triple limit of a large number of colors, large quark mass and strong 't Hooft gauge coupling. In the heavy quark limit, the pentaquarks with internal heavy quark spin S are all degenerate. The holographic pentaquarks are dual to an instanton bound to heavy mesons in bulk, without the shortcomings related to the nature of the interaction and the choice of the hard core inherent to the molecular constructions. We explicitly derive the spin-spin and spin-orbit couplings arising from next to leading order in the heavy quark mass, and lift totally the internal spin degeneracy, in fair agreement with the newly reported charmed pentaquarks from LHCb. New charm and bottom pentaquark states are predicted.
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