https://doi.org/10.1140/epjc/s10052-016-4436-7
Regular Article - Theoretical Physics
Tetraquark states with open flavors
1
Department of Physics, Hebei Normal University, Shijiazhuang, 050024, China
2
School of Physics, University of Chinese Academy of Sciences, YuQuan Road 19A, Beijing, 100049, China
3
CAS Center for Excellence in Particle Physics, Beijing, 100049, China
* e-mail: qiaocf@ucas.ac.cn
Received:
16
August
2016
Accepted:
10
October
2016
Published online:
18
October
2016
In this work, we estimate the masses of tetraquark states with four different flavors by virtue of QCD sum rules, in both b and c sectors. We construct four 
tetraquark currents with 
, and then we perform an analytic calculation up to dimension eight in the operator product expansion. We keep terms which are linear in the strange quark mass 
, and in the end we find two possible tetraquark states with masses 
and 
GeV. We find that their charmed-partner masses lie in 
and 
GeV, respectively, and are hence accessible in experiments like BESIII and Belle.
© The Author(s), 2016
