https://doi.org/10.1140/epja/s10050-019-00012-y
Regular Article - Theoretical Physics
Systematical investigation on the stability of doubly heavy tetraquark states
1
School of Physical Science and Technology, Southwest University, Chongqing, 400715, China
2
School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210097, China
* e-mail: crdeng@swu.edu.cn
Received:
3
July
2019
Accepted:
6
November
2019
Published online:
14
January
2020
We systematically investigate the stability of the doubly heavy tetraquark states 
(
and b, 
, d and s) within the framework of the alternative color flux-tube model involving a multi-body confinement potential, 
-exchange, one-gluon exchange and one-Goldstone-boson-exchange interactions. Our numerical analysis indicates that the states 
with 
and 
with 
are the most promising stable states against the strong interaction. The states 
with , 
with 
and , and with 
as stable states are also predicted in the model. The dynamical mechanism producing those stable states with tetrahedral structure are discussed in the model. The states and with 
would not be stable although they are, respectively, below the 
and 
thresholds because they can decay into D-wave 
and 
through the strong interaction. The states should have narrow widths if they really exist as our model prediction.
© Società Italiana di Fisica (SIF) and Springer-Verlag GmbH Germany, part of Springer Nature, 2020
