Article (Scientific journals)
Spectrum of the $uudc \bar c$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction
Stancu, Floarea
2019In European Physical Journal C. Particles and Fields, 79, p. 957 (12
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Keywords :
hidden charm pentaquarks; masses; flavospin hyperfine interaction
Abstract :
[en] We study a few of the lowest states of the pentaquark $uudc\overline{c}$, of positive and negative parity, in a constituent quark model with an SU(4) flavor-spin hyperfine interaction. For positive parity we introduce space wave functions of appropriate permutation symmetry with one unit of orbital angular momentum in the internal motion of the four-quark subsystem or an orbital excitation between the antiquark and the four quark subsystem which remains in the ground state. We show that the lowest positive parity states $1/2^+, 3/2^+$ are provided by the first alternative and are located below the $1/2^-$ and the $1/2^+$ states with all quarks in the ground state. We compare our results with the LHCb three narrow pentaquark structures reported in 2019.
Disciplines :
Physics
Author, co-author :
Stancu, Floarea ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
Spectrum of the $uudc \bar c$ hidden charm pentaquark with an SU(4) flavor-spin hyperfine interaction
Publication date :
21 November 2019
Journal title :
European Physical Journal C. Particles and Fields
ISSN :
1434-6044
eISSN :
1434-6052
Publisher :
Springer, Heidelberg, Germany
Volume :
79
Pages :
957 (12p)
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 November 2019

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