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000860328 0247_ $$2doi$$a10.1103/PhysRevD.66.034506
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000860328 0247_ $$2ISSN$$a1089-4918
000860328 0247_ $$2ISSN$$a1538-4500
000860328 0247_ $$2ISSN$$a1550-2368
000860328 0247_ $$2ISSN$$a1550-7998
000860328 0247_ $$2ISSN$$a2470-0010
000860328 0247_ $$2ISSN$$a2470-0029
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000860328 1001_ $$0P:(DE-HGF)0$$aDolgov, D.$$b0
000860328 245__ $$aMoments of nucleon light cone quark distributions calculated in full lattice QCD
000860328 260__ $$aMelville, NY$$bInst.812068$$c2002
000860328 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2002-08-26
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000860328 520__ $$aMoments of the quark density, helicity, and transversity distributions are calculated in unquenched lattice QCD. Calculations of proton matrix elements of operators corresponding to these moments through operator product expansion have been performed on 163×32 lattices for Wilson fermions at β=5.6 using configurations from the SESAM Collaboration and at β=5.5 using configurations from SCRI. One-loop perturbative renormalization corrections are included. At quark masses accessible in present calculations, there is no statistically significant difference between quenched and full QCD results, indicating that the contributions of quark-antiquark excitations from the Dirac sea are small. The close agreement between calculations with cooled configurations containing essentially only instantons and the full gluon configurations indicates that quark zero modes associated with instantons play a dominant role. A naive linear extrapolation of the full QCD calculation to the physical pion mass yields results inconsistent with experiment. An extrapolation to the chiral limit including the physics of the pion cloud can resolve this discrepancy and the requirements for a definitive chiral extrapolation are described.
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000860328 7001_ $$0P:(DE-HGF)0$$aBrower, R.$$b1
000860328 7001_ $$0P:(DE-HGF)0$$aCapitani, S.$$b2
000860328 7001_ $$0P:(DE-HGF)0$$aDreher, P.$$b3
000860328 7001_ $$0P:(DE-HGF)0$$aNegele, J. W.$$b4
000860328 7001_ $$0P:(DE-HGF)0$$aPochinsky, A.$$b5
000860328 7001_ $$0P:(DE-HGF)0$$aRenner, D. B.$$b6
000860328 7001_ $$0P:(DE-Juel1)132090$$aEicker, N.$$b7$$ufzj
000860328 7001_ $$0P:(DE-Juel1)132179$$aLippert, Th.$$b8$$ufzj
000860328 7001_ $$0P:(DE-HGF)0$$aSchilling, K.$$b9
000860328 7001_ $$0P:(DE-HGF)0$$aEdwards, R. G.$$b10
000860328 7001_ $$0P:(DE-HGF)0$$aHeller, U. M.$$b11
000860328 77318 $$2Crossref$$3journal-article$$a10.1103/physrevd.66.034506$$b : American Physical Society (APS), 2002-08-26$$n3$$p034506$$tPhysical Review D$$v66$$x0556-2821$$y2002
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