https://doi.org/10.1140/epjc/s10052-018-5694-3
Regular Article - Theoretical Physics
Status of quarkonia-like negative and positive parity states in a relativistic confinement scheme
1
Department of Physics, Sardar Patel University, Vallabh Vidyanagar, 388120, India
2
P D Patel Institute of Applied Sciences, CHARUSAT, Changa, 388421, India
* e-mail: tanvibhavsar1992@yahoo.com
Received:
25
October
2017
Accepted:
3
March
2018
Published online:
16
March
2018
Properties of quarkonia-like states in the charm and bottom sector have been studied in the frame work of relativistic Dirac formalism with a linear confinement potential. We have computed the mass spectroscopy and decay properties (vector decay constant and leptonic decay width) of several quarkonia-like states. The present study is also intended to identify some of the unexplained states as mixed P-wave and mixed S–D-wave states of charmonia and bottomonia. The results indicate that the X(4140) state can be an admixture of two P states of charmonium. And the charmonium-like states X(4630) and X(4660) are the admixed state of S–D-waves. Similarly, the X(10610) state recently reported by Belle II can be mixed P-states of bottomonium. In the relativistic framework we have computed the vector decay constant and the leptonic decay width for S wave charmonium and bottomonium. The leptonic decay widths for the 
mixed states are also predicted. Further, both the masses and the leptonic decay width are considered for the identification of the quarkonia-like states.
© The Author(s), 2018
