https://doi.org/10.1140/epjc/s2004-01997-7
theoretical physics
Structures of the f
0(980), a
0(980) mesons and the strong coupling constants 
with light-cone QCD sum rules
1
Department of Physics, North China Electric Power University, 071003, Baoding, P.R. China
2
CCAST (World Laboratory), P.O. Box 8730, 100080, Beijing, P.R. China
3
Department of Modern Physics, University of Science and Technology of China, 230026, Hefei, P.R. China
* e-mail: wangzgyiti@yahoo.com.cn
Making the assumption of explicit isospin violation arising from f
0(980)-a
0(980) mixing, we take the point of view that the scalar mesons f
0(980) and a
0(980) have both strange and non-strange quark-antiquark components and evaluate the strong coupling constants 
within the framework of the light-cone QCD sum rules approach. The large strong scalar-KK couplings through both the 
and 
components 
, 
, 
and 
will support the hadronic dressing mechanism; furthermore, in spite of the constituent structure differences between the f
0(980) and a
0(980) mesons, the strange components have larger strong coupling constants with the K
+
K
- state than the corresponding non-strange ones, 
and 
. From the existing controversial values, we cannot reach a general consensus on the strong coupling constants 
and the mixing angles.
© Springer-Verlag, 2004
