The I^G J^{PC}=0^+ 1^{-+} Tetraquark State
Abstract
We study the tetraquark state with I^G J^{PC} = 0^+ 1^{-+} in the QCD sum rule. We exhaust all possible flavor structures by using a diquark-antidiquark construction and find that the flavor structure 3*6+6*3 is preferred. There are altogether four independent currents which have the quark contents q s \bar q \bar s. By using both the Shifman-Vainshtein-Zakharov (SVZ) sum rule and the finite energy sum rule, these currents lead to mass estimates around 1.8 - 2.1 GeV, where the uncertainty is due to the mixing of two single currents. Its possible decay modes are S-wave b_1(1235) \eta and b_1(1235) \eta^\prime, and P-wave KK, \eta \eta, \eta \eta^\prime and \eta^\prime \eta^\prime, etc. The decay width is around 150 MeV through a rough estimation.
Keywords
Cite
@article{arxiv.0808.2344,
title = {The I^G J^{PC}=0^+ 1^{-+} Tetraquark State},
author = {Hua-Xing Chen and Atsushi Hosaka and Shi-Lin Zhu},
journal= {arXiv preprint arXiv:0808.2344},
year = {2008}
}
Comments
4 pages, 4 figures, revised version to appear in Phys. Rev. D