https://doi.org/10.1140/epjc/s10052-019-6906-1
Regular Article - Theoretical Physics
Study of 
, 
, and 
in a quasipotential Bethe–Salpeter equation approach
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, 210097, China
* e-mail: junhe@njnu.edu.cn
Received:
28
March
2019
Accepted:
27
April
2019
Published online:
8
May
2019
Very recently, the LHCb Collaboration reported their new results about the pentaquarks at charm energy region. Based on the new experimental results, we recalculate the molecular states composed of a 
baryon and a 
meson in a quasipotential Bethe–Salpeter equation approach. The two-peak structure around 4450 MeV can be interpreted as two 
bound states with spin parities 
and 
. The newly observed pentaquark can be assigned as a 
bound state with spin parity . The experimental determination of spin parities will be very helpful to understand the internal structure of these pentaquarks.
© The Author(s), 2019
