Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/17567
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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 1550-2368 |
Statement of Responsibility: | 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 |
DOI: | 10.1103/PhysRevD.72.074507 |
Published version: | http://dx.doi.org/10.1103/physrevd.72.074507 |
Appears in Collections: | Aurora harvest 6 Special Research Centre for the Subatomic Structure of Matter publications |
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hdl_17567.pdf | Published version | 764.96 kB | Adobe PDF | View/Open |
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