000201117 001__ 201117
000201117 005__ 20210129215634.0
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000201117 1001_ $$0P:(DE-HGF)0$$aChambers, A. J.$$b0$$eCorresponding Author
000201117 245__ $$aFeynman-Hellmann approach to the spin structure of hadrons
000201117 260__ $$a[S.l.]$$bSoc.$$c2014
000201117 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2014-07-24
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000201117 520__ $$aWe perform a Nf=2+1 lattice QCD simulation to determine the quark spin fractions of hadrons using the Feynman-Hellmann theorem. By introducing an external spin operator to the fermion action, the matrix elements relevant for quark spin fractions are extracted from the linear response of the hadron energies. Simulations indicate that the Feynman-Hellmann method offers statistical precision that is comparable to the standard three-point function approach, with the added benefit that it is less susceptible to excited-state contamination. This suggests that the Feynman-Hellmann technique offers a promising alternative for calculations of quark line disconnected contributions to hadronic matrix elements. At the SU(3)-flavor symmetry point, we find that the connected quark spin fractions are universally in the range 55%–70% for vector mesons and octet and decuplet baryons. There is an indication that the amount of spin suppression is quite sensitive to the strength of SU(3) breaking.
000201117 536__ $$0G:(DE-HGF)POF3-511$$a511 - Computational Science and Mathematical Methods (POF3-511)$$cPOF3-511$$fPOF III$$x0
000201117 536__ $$0G:(DE-Juel1)hlz22_20161101$$aHadron physics using background fields (hlz22_20161101)$$chlz22_20161101$$fHadron physics using background fields$$x1
000201117 536__ $$0G:(DE-Juel1)hde12_20141101$$aDisconnected Contributions to Matrix Elements and Renormalization factors (hde12_20141101)$$chde12_20141101$$fDisconnected Contributions to Matrix Elements and Renormalization factors$$x2
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000201117 7001_ $$0P:(DE-HGF)0$$aHorsley, R.$$b1
000201117 7001_ $$0P:(DE-HGF)0$$aNakamura, Y.$$b2
000201117 7001_ $$0P:(DE-HGF)0$$aPerlt, H.$$b3
000201117 7001_ $$0P:(DE-Juel1)144441$$aPleiter, D.$$b4$$ufzj
000201117 7001_ $$0P:(DE-HGF)0$$aRakow, P. E. L.$$b5
000201117 7001_ $$0P:(DE-HGF)0$$aSchierholz, G.$$b6
000201117 7001_ $$0P:(DE-HGF)0$$aSchiller, A.$$b7
000201117 7001_ $$0P:(DE-HGF)0$$aStüben, H.$$b8
000201117 7001_ $$0P:(DE-HGF)0$$aYoung, R. D.$$b9
000201117 7001_ $$0P:(DE-HGF)0$$aZanotti, J. M.$$b10
000201117 77318 $$2Crossref$$3journal-article$$a10.1103/physrevd.90.014510$$b : American Physical Society (APS), 2014-07-24$$n1$$p014510$$tPhysical Review D$$v90$$x1550-7998$$y2014
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