Regular Article - Theoretical Physics
Investigation of in a chiral quark model
Department of Physics and Jiangsu Key Laboratory for Numerical Simulation of Large Scale Complex Systems, Nanjing Normal University, 210023, Nanjing, People’s Republic of China
Accepted: 21 April 2021
Published online: 28 April 2021
Recently, three new states of were observed in the invariant mass spectrum of by LHCb collaboration. In this work, we use a chiral quark model to investigate these three exited states with the help of Gaussian expansion method both in three-quark structure and in five-quark structure with all possible quantum numbers , , , , and . The calculations shows that the masses of 2S and 1D states of are comparable to experimental results; In addition, the resonance states of five-quark configuration are possible candidates of these new states with negative parity by using the real scaling method and their decay width is also given.
© The Author(s) 2021
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