Scalar Tetraquarks of Light Flavors in the QCD Sum Rule

Preprint

18 September 2006

preprint
Published by arXiv in arXiv

Abstract

We study the low-lying scalar mesons of light u, d, s flavors in the QCD sum rule. Having all possible combinations of tetraquark currents in the local form, QCD sum rule analysis has been carefully performed. We found that using the appropriate tetraquark currents, the masses of sigma, kappa, f_0 and a_0 mesons appear in the region of 0.6 -- 1 GeV with the expected ordering. The results are compared with that of the conventional \bar{q} q currents, where the masses are significantly larger.

Keywords

TETRAQUARK CURRENTS
SCALAR TETRAQUARKS
LIGHT FLAVORS
QCD SUM RULE
SUM RULE
MESONS

All Related Versions

Version 1, 2006-09-18, ArXiv
Version 2, 2007-01-01, ArXiv
Version 3, 2007-06-20, ArXiv
Published version: Physics Letters B, 650 (5-6), 369.

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