Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/17561
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Type: | Journal article |
Title: | Search for the pentaquark resonance signature in lattice QCD |
Author: | Lasscock, B. Hedditch, J. Kamleh, W. Leinweber, D. Melnitchouk, W. Thomas, A. Williams, A. Young, R. Zanotti, J. |
Citation: | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2005; 72(1):014502-1-014502-22 |
Publisher: | American Physical Soc |
Issue Date: | 2005 |
ISSN: | 1550-7998 0556-2821 |
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: | Claims concerning the possible discovery of the Θ+ pentaquark, with minimal quark content uudds̅ , have motivated our comprehensive study into possible pentaquark states using lattice QCD. We review various spin-1/2 pentaquark interpolating fields in the literature and create a new candidate ideal for lattice QCD simulations. Using these interpolating fields we attempt to isolate a signal for a five-quark resonance. Calculations are performed using improved actions on a large 203×40 lattice in the quenched approximation. The standard lattice resonance signal of binding at quark masses near the physical regime, observed for established baryon resonances, is not observed for spin-1/2 pentaquark states. Thus we find no evidence supporting the existence of a spin-1/2 pentaquark resonance in quenched QCD. |
Rights: | ©2005 American Physical Society |
DOI: | 10.1103/PhysRevD.72.014502 |
Published version: | http://dx.doi.org/10.1103/physrevd.72.014502 |
Appears in Collections: | Aurora harvest 2 Special Research Centre for the Subatomic Structure of Matter publications |
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hdl_17561.pdf | Published version | 510.32 kB | Adobe PDF | View/Open |
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