https://doi.org/10.1140/epjc/s10052-019-7529-2
Regular Article - Theoretical Physics
Exploring a 
state: with focus on 
Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, People’s Republic of China
* e-mail: jrzhang@nudt.edu.cn
Received:
23
September
2019
Accepted:
29
November
2019
Published online:
12
December
2019
Stimulated by the new discovery of by LHCb Collaboration, we endeavor to perform the study of as a state in the framework of QCD sum rules. Taking into account the results from two sum rules, a conservative mass range 
is presented for the hadronic system, which agrees with the experimental data of and could support its interpretation as a state.
© The Author(s), 2019
