https://doi.org/10.1140/epjc/s10052-013-2661-x
Regular Article - Theoretical Physics
Could Z
c
(4025) be a J
P
=1+
molecular state?
1
Department of Physics, School of Biomedical Engineering, Third Military Medical University, Chongqing, 400038, China
2
College of Science, National University of Defense Technology, Hunan, 410073, China
* e-mail: cycui@nudt.edu.cn
Received:
13
October
2013
Revised:
12
November
2013
Published online:
3
December
2013
We investigate whether the newly observed narrow resonance Z
c
(4025) can be described as a molecular state with quantum numbers J
P
=1+. Using QCD sum rules, we consider contributions up to dimension six in the operator product expansion and work at leading order of α
s
. The mass obtained for this state is (4.05±0.28) GeV. It is concluded that the molecular state is a possible candidate for Z
c
(4025).
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
