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A QCD sum rule analysis of the pentaquark
release_rev_021783b2-6486-42bb-8033-d6d3491305bb
by
Hee-Jung Lee,
N.I.Kochelev,
V. Vento
Released
as a report
.
2005
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 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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