https://doi.org/10.1140/epjc/s10052-018-6054-z
Regular Article - Theoretical Physics
Strong decays of the orbitally excited scalar 
mesons
1
Department of Physics, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China
2
CCAST (World Laboratory), P.O. Box 8730, Beijing, 100080, People’s Republic of China
3
Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing, 100080, People’s Republic of China
* e-mail: thwang@hit.edu.cn
Received:
28
February
2018
Accepted:
8
July
2018
Published online:
18
July
2018
We calculate the two-body strong decays of the orbitally excited scalar mesons 
and 
by using the relativistic Bethe–Salpeter (BS) method. was observed recently by the LHCb Collaboration, the quantum number of which has not been determined yet. In this paper, we assume that it is the 
state and obtain the transition amplitude by using the PCAC relation, low-energy theorem and effective Lagrangian method. For the 1P state, the total widths of 
and 
are 226 and 246 MeV, respectively. With the assumption of state, the widths of 
and 
are both about 131 MeV, which is close to the present experimental data. Therefore, is a strong candidate for the 
state.
© The Author(s), 2018
