Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-05-07
Phys.Rev.D76:054510,2007
Physics
High Energy Physics
High Energy Physics - Lattice
10 pages, 4 figures, 1 table
Scientific paper
10.1103/PhysRevD.76.054510
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.
Hedditch J. N.
Kamleh Waseem
Lasscock Ben G.
Leinweber Derek B. .
Melnitchouk Wally
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