Analysis the $f_0(980)$ and $a_0(980)$ mesons as four-quark states with the QCD sum rules

Details Analysis the $f_0(980)$ and $a_0(980)$ mesons as four-quark states with the QCD sum rules Analysis the $f_0(980)$ and $a_0(980)$ mesons as four-quark states with the QCD sum rules

2005-01-13

arxiv.org/abs/hep-ph/0501105v2

Eur.Phys.J.C42:89-92,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure, revised version

Scientific paper

10.1140/epjc/s2005-02263-4

In this article, we take the point of view that the scalar mesons $ f_0(980)$ and $a_0(980)$ are diquark-antidiquark states $(qq)_{\bar{3}}(\bar{q}\bar{q})_3$, and devote to determine their masses in the framework of the QCD sum rules 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.

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