Investigation of Ξc0 in a chiral quark model

Recently, three new states of Ξ c 0 were observed in the invariant mass spectrum of Λ c + K - 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...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2021-04, Vol.81 (4)
Main Authors: Hu, Xiaohuang, Tan, Yue, Ping, Jialun
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Collaboration
Color
Elementary Particles
Hadrons
Heavy Ions
Investigations
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum numbers
Quark models
Quarks
Regular Article - Theoretical Physics
String Theory
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Summary:Recently, three new states of Ξ c 0 were observed in the invariant mass spectrum of Λ c + K - 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 I J P = 1 2 ( 1 2 ) - , 1 2 ( 3 2 ) - , 1 2 ( 5 2 ) - , 3 2 ( 1 2 ) - , 3 2 ( 3 2 ) - and 3 2 ( 5 2 ) - . The calculations shows that the masses of 2 S and 1 D states of Ξ c 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.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-021-09175-9