Actions for Nucleon, $\Delta$ and $\Omega$ excited states in $N_f=2+1$ lattice QCD [electronic resource].

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Nucleon, $\Delta$ and $\Omega$ excited states in $N_f=2+1$ lattice QCD [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Nuclear Physics, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 014,507 : digital, PDF file
Additional Creators
Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Nuclear Physics, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The energies of the excited states of the Nucleon, $\Delta$ and $\Omega$ are computed in lattice QCD, using two light quarks and one strange quark on anisotropic lattices. The calculation is performed at three values of the light quark mass, corresponding to pion masses $m_{\pi}$ = 392(4), 438(3) and 521(3) MeV. We employ the variational method with a large basis of interpolating operators enabling six energies in each irreducible representation of the lattice to be distinguished clearly. We compare our calculation with the low-lying experimental spectrum, with which we find reasonable agreement in the pattern of states. In addition, the need to include operators that couple to the expected multi-hadron states in the spectrum is clearly identified.
Report Numbers
E 1.99:jlab-thy--10-1170
E 1.99: doe/or/23177--1219
doe/or/23177--1219
jlab-thy--10-1170
Subject(s)
Note
Published through SciTech Connect.
07/22/2010.
"jlab-thy--10-1170"
" doe/or/23177--1219"
Physical Review. D, Particles, Fields, Gravitation and Cosmology 82 1 ISSN 1550-7998; PRVDAQ AM
John Bulava; Robert G. Edwards; Eric Engelson; Balint Joo; Huey -Wen Lin; Colin Morningstar; David G. Richards; Stephen J. Wallace.
Funding Information
AC05-06OR23177
View MARC record | catkey: 23504638