Eur. Phys. J. C (2017) 77: 43
https://doi.org/10.1140/epjc/s10052-017-4596-0

Regular Article - Theoretical Physics

The strong decays of X(3940) and X(4160)

¹ School of Electrical and Information Engineering, Beifang University of Nationalities, Yinchuan, 750021, People’s Republic of China
² Department of Physics, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China
³ Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260, USA

^* e-mail: 2013086@nun.edu.cn

Received: 23 August 2016
Accepted: 1 January 2017
Published online: 24 January 2017

Abstract

The new mesons X(3940) and X(4160) have been found by Belle Collaboration in the processes . Considering X(3940) and X(4160) as and states, the two-body open charm OZI-allowed strong decay of and are studied by the improved Bethe–Salpeter method combined with the model. The strong decay width of is MeV, which is close to the result of X(3940); therefore, is a good candidate of X(3940). The strong decay width of is MeV, considering the errors of the results, it is close to the lower limit of X(4160). But the ratio of the decay width of is larger than the experimental data of X(4160). According to the above analysis, is not the candidate of X(4160), and more investigations of X(4160) is needed.