A QCD sum rule analysis of the pentaquark
release_6uyuu36pzna4vfpfttcoi7fqsq
by
Hee-Jung Lee,
N.I.Kochelev,
V. Vento
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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