Scalar Tetraquark Currents With Application to the QCD Sum Rule

Details Scalar Tetraquark Currents With Application to the QCD Sum Rule Scalar Tetraquark Currents With Application to the QCD Sum Rule

2008-11-10

arxiv.org/abs/0811.1514v1

Mod.Phys.Lett.A23:2234-2237,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at Workshop on Chiral Symmetry in Hadron and Nuclear Physics: Chiral07, Osaka, Japan, 13-16 Nov 2007

Scientific paper

10.1142/S0217732308029095

We study the light scalar mesons in the QCD sum rule. We construct both the diquark-antidiquark currents $(qq)(\bar q \bar q)$ and the meson-meson currents $(\bar qq)(\bar qq)$. We find that there are five independent currents for both cases, and derive the relations between them. For the meson-meson currents, five independent currents are formed by products of color singlet $\bar q q$ pairs or color octet pairs. However, they can be related to each other, and the relations are derived. We obtain the masses of the light scalar mesons which are consistent with the experiments.

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