Analysis the f 0(980) and a 0(980) mesons as four-quark states with the QCD sum rules
Department of Physics, North China Electric Power University, 071003, Baoding, P.R. China
2 Department of Modern Physics, University of Science and Technology of China, 230026, Hefei, P.R. China
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In this article, we take the point of view that the scalar mesons f 0(980) and a 0(980) are the diquark-antidiquark states , and we devote our attention to the determination of their masses in the framework of the QCD sum rule approach with the interpolating currents constructed from scalar-scalar type and pseudoscalar-pseudoscalar type diquark pairs respectively. The numerical results indicate that the scalar mesons f 0(980) and a 0(980) may have two possible diquark-antidiquark substructures.
© Springer-Verlag, 2005