Light Scalar Tetraquark Mesons in the QCD Sum Rule
High Energy Physics - Phenomenology
2011-11-10 v2
Abstract
We study the lowest-lying scalar mesons in the QCD sum rule by considering them as tetraquark states. We find that there are five independent currents for each state with a certain flavor structure. By forming linear combinations, we find that some mixed currents give reliable QCD sum rules. Among various tetraquark currents, we consider those which are constructed by the diquarks having anti-symmetric and symmetric flavor structures. That the results of the QCD sum rule derived from the two types of currents are similar suggests that the tetraquark states can have a large mixing between different flavor structures.
Keywords
Cite
@article{arxiv.0707.4586,
title = {Light Scalar Tetraquark Mesons in the QCD Sum Rule},
author = {Hua-Xing Chen and Atsushi Hosaka and Shi-Lin Zhu},
journal= {arXiv preprint arXiv:0707.4586},
year = {2011}
}
Comments
18 pages, 5 figures; reference added, minor corrections; version to appear in Phys.Rev.D