Penta-quark baryon from the QCD Sum Rule
High Energy Physics - Phenomenology
2009-11-10 v2 High Energy Physics - Experiment
Nuclear Theory
Abstract
Exotic penta-quark baryon with strangeness +1, \Theta^+, is studied in the QCD sum rule approach. We derive sum rules for the positive and negative parity baryon states with J=1/2 and I=0. It is found that the standard values of the QCD condensates predict a negative parity \Theta^+ of mass \simeq 1.5 GeV, while no positive parity state is found. We stress the roles of chiral-odd condensates in determining the parity and mass of \Theta^+.
Keywords
Cite
@article{arxiv.hep-ph/0309271,
title = {Penta-quark baryon from the QCD Sum Rule},
author = {Jun Sugiyama and Takumi Doi and Makoto Oka},
journal= {arXiv preprint arXiv:hep-ph/0309271},
year = {2009}
}
Comments
7 pages, 3 figures, To be published in Phys.Lett.B