Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/29099
Type: Conference paper
Title: Spin-3/2 pentaquark resonance signature
Author: Lasscock, B.
Hedditch, J.
Leinweber, D.
Williams, A.
Kamleh, W.
Melnitchouk, W.
Thomas, A.
Young, R.
Zanotti, J.
Citation: Proceedings of Science: XXIIIrd International Symposium on Lattice Field Theory, 25-30 July 2005 / pp.067-1-067-6
Publisher: Scuola Internazionale Superiore di Studi Avanzati
Publisher Place: Italy
Issue Date: 2005
Conference Name: International Symposium on Lattice Field Theory (23rd : 2005 : Dublin, Ireland)
Abstract: We search for the standard lattice resonance signature of attraction between the resonance constituents which leads to a bound state at quark masses near the physical regime. We study a variety of spin- 1/2 interpolators and for the first time, interpolators providing access to spin- 3/2 pentaquark states. In looking for evidence of binding, a precise determination of the mass splitting between the pentaquark state and its lowest-lying decay channel is performed by constructing the effective mass splitting from the various two-point correlation functions. While the binding of the pentaquark state is not a requirement, the observation of such binding would provide compelling evidence for the existence of the Θ⁺ pentaquark resonance. Evidence of binding is observed in the isoscalar spin- 3/2 positive parity channel, making it an interesting state for further research.
Rights: Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
RMID: 0020052100
Published version: http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=20
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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