QCD Sum Rule Study of the Masses of Light Tetraquark Scalar Mesons
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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 considerably larger.
4 pages, 2 figures; reference added, minor corrections; version to appear in Physics Letters B
4 pages, 2 figures; reference added, minor corrections; version to appear in Physics Letters B