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Type: Journal article
Title: Spin-3/2 pentaquark resonance signature in lattice QCD
Author: Lasscock, B.
Leinweber, D.
Melnitchouk, W.
Thomas, A.
Williams, A.
Young, R.
Zanotti, J.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2005; 72(7):074507-1-074507-10
Publisher: American Physical Soc
Issue Date: 2005
ISSN: 1550-7998
Statement of
B. G. Lasscock, J. Hedditch, W. Kamleh, D. B. Leinweber, W. Melnitchouk, A. W. Thomas, A. G. Williams, R. D. Young, and J. M. Zanotti
Abstract: The possible discovery of the Θ+ pentaquark has motivated a number of studies of its nature using lattice QCD. While all the analyses thus far have focused on spin-1/2 states, here we report the results of the first exploratory study in quenched lattice QCD of pentaquarks with spin 3/2. For the spin-3/2 interpolating field we use a product of the standard N and K* operators. We do not find any evidence for the standard lattice resonance signature of attraction (i.e., binding at quark masses near the physical regime) in the JP=3/2- channel. Some evidence of binding is inferred in the isoscalar 3/2+ channel at several quark masses, in accord with the standard lattice resonance signature. This suggests that this is a good candidate for the further study of pentaquarks on the lattice.
Rights: ©2005 American Physical Society
RMID: 0020051196
DOI: 10.1103/PhysRevD.72.074507
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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