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Type: Journal article
Title: Even parity excitations of the nucleon in lattice QCD
Author: Lasscock, B.
Hedditch, J.
Kamleh, W.
Leinweber, D.
Melnitchouk, W.
Williams, A.
Zanotti, J.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2007; 76(5):054510-01-054510-08
Publisher: American Physical Soc
Issue Date: 2007
ISSN: 1550-7998
Statement of
B. G. Lasscock, J. N. Hedditch, W. Kamleh, D. B. Leinweber, W. Melnitchouk, A. G. Williams, and J. M. Zanotti
Abstract: We study the spectrum of the even parity excitations of the nucleon in quenched lattice QCD. We extend our earlier analysis by including an expanded basis of nucleon interpolating fields, increasing the physical size of the lattice, including more configurations to enhance statistics and probing closer to the chiral limit. With a review of world lattice data, we conclude that there is little evidence of the Roper resonance in quenched lattice QCD.
Keywords: High Energy Physics - Lattice (hep-lat)
Rights: ©2007 American Physical Society
DOI: 10.1103/PhysRevD.76.054510
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