Exploring excited states of the nucleon in 2+1 flavor lattice QCD
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(Published version)
Date
2012
Authors
Mahbub, M.
Kamleh, W.
Leinweber, D.
Moran, P.
Williams, A.
Editors
Burkert, V.
Jones, M.
Pennington, M.
Richards, D.
Jones, M.
Pennington, M.
Richards, D.
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Conference paper
Citation
AIP Conference Proceedings, 2012; 1432:261-264
Statement of Responsibility
M. S. Mahbub, W. Kamleh, D. B. Leinweber, P. J. Moran, and A. G. Williams
Conference Name
International Workshop on the Physics of Excited Nucleons (8th : 2011 : Newport News, Virginia, U.S.A.)
Abstract
Our recent first-principles lattice-QCD exploration of the ground and first eleven excited states of the nucleon in the positive parity channel is presented. Of particular interest is the first positive-parity excitation of the uncleon; the Roper resonance. Using correlation-matrix methods developed by the CSSM Lattice Collaboration, a low-lying Roper state is observed in our full QCD analysis using the PACS-CS gauge fields made available via the ILDG. Our results for the Roper display significant curvature as the chiral regime is approached. © 2012 American Institute of Physics.
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© 2012 American Institute of Physics