Study of [Formula omitted] pentaquark system in the chiral quark model

• Published in: The European physical journal. C, Particles and fields Vol. 81; no. 3
• Main Authors: Zhang, Qi, Hu, Xiao-Huang, He, Bing-Ran, Ping, Jia-Lun
• Format: Journal Article
• Language: English
• Published: Springer 01.03.2021
• Subjects: Analysis; Quarks
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-021-09017-8

With the discovery of some hidden-charm pentaquark resonances by the LHCb Collaboration, investigations of pentaquark states containing heavy quarks have aroused the interest of theorists. We study herein [Formula omitted] ( [Formula omitted] or d, [Formula omitted] or b) pentaquark system, in the framework of the chiral quark model. In consequence, some charmed and bottomed pentaquarks are considered to exist by five-body dynamical calculations. In the charm sector, [Formula omitted] and [Formula omitted] are possible candidates of [Formula omitted] and [Formula omitted], respectively. Besides, two high-spin states, [Formula omitted] and [Formula omitted], are also found in the energy region of [Formula omitted] GeV. In the bottom sector, [Formula omitted], [Formula omitted] could be candidates of [Formula omitted] and [Formula omitted], respectively. And [Formula omitted] and [Formula omitted] are found in the energy region of [Formula omitted] GeV. [Formula omitted] and [Formula omitted] are expected as compact states, while [Formula omitted], [Formula omitted], [Formula omitted] and [Formula omitted] are expected as molecular states.