Investigation of the second moment of the nucleon's g(1) and g(2) structure functions in two-flavor lattice QCD - INSPIRE

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Investigation of the second moment of the nucleon's g(1) and g(2) structure functions in two-flavor lattice QCD

M. Gockeler
(
- Munich, Max Planck Inst. and
- Regensburg U.
)
,
R. Horsley
(
- Edinburgh U.
)
,
D. Pleiter
(
- NIC, Zeuthen
)
,
Paul E.L. Rakow
(
- Liverpool U., Dept. Math.
)
,
A. Schafer
(
- Regensburg U.
)

Jun, 2005

9 pages

Published in:

Phys.Rev.D 72 (2005) 054507

e-Print:

hep-lat/0506017 [hep-lat]

DOI:

10.1103/PhysRevD.72.054507

Report number:

DESY-05-076,
EDINBURGH-2005-04,
MPP-2005-52

View in:

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Abstract:

The reduced matrix elements a_2 and d_2 are computed in lattice QCD with N_f=2 flavors of light dynamical (sea) quarks. For proton and neutron targets we obtain as our best estimates d_2^(p)=0.004(5) and d_2^(n)=-0.001(3), respectively, in the MSbar scheme at Q^2=5 GeV^2, while for a_2 we find a_2^(p)=0.077(12) and a_2^(n)=-0.005(5), where the errors are purely statistical.

12.38.Gc
13.60.Hb
13.88.+e
lattice QCD
deep-inelastic scattering
higher twist
non-perturbative renormalization
fermion: lattice field theory
gauge field theory: SU(3)
flavor: 2

References(31)

Figures(0)

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