A QCD sum rule analysis of the pentaquark

Details A QCD sum rule analysis of the pentaquark A QCD sum rule analysis of the pentaquark

2005-06-24

arxiv.org/abs/hep-ph/0506250v3

Phys.Rev. D73 (2006) 014010

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 8 figures, version to be appeared in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.73.014010

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 $d=13$ in the OPE and the direct instanton contributions. We find evidence for a positive parity state. The contribution from operators of dimension $d>5$ is instrumental in determining the parity of the state and achieving the convergence of the sum rule.

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