A QCD sum rule analysis of the pentaquark
High Energy Physics - Phenomenology
2009-11-11 v3
Abstract
We perform a QCD sum rule calculation to determine the mass and the parity of the lowest lying pentaquark state. We include operators up to dimension in the OPE and the direct instanton contributions. We find evidence for a positive parity state. The contribution from operators of dimension is instrumental in determining the parity of the state and achieving the convergence of the sum rule.
Cite
@article{arxiv.hep-ph/0506250,
title = {A QCD sum rule analysis of the pentaquark},
author = {Hee-Jung Lee and N. I. Kochelev and V. Vento},
journal= {arXiv preprint arXiv:hep-ph/0506250},
year = {2009}
}
Comments
10 pages, 8 figures, version to be appeared in Phys. Rev. D