Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-17
Phys.Rev.D82:076007,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 6 figures
Scientific paper
10.1103/PhysRevD.82.076007
The generalized Gerasimov-Drell-Hearn (GDH) sum rule is known to be very sensitive to QCD radiative and power corrections. We improve the previously developed QCD-inspired model for the $Q^2$-dependence of the GDH sum rule. We take into account higher order radiative and higher twist power corrections extracted from precise Jefferson Lab data on the lowest moment of the spin-dependent proton structure function $\Gamma_1^{p}(Q^2)$ and on the Bjorken sum rule $\Gamma_1^{p-n}(Q^2)$. By using the singularity-free analytic perturbation theory we demonstrate that the matching point between chiral-like positive-$Q^2$ expansion and QCD operator product $1/Q^2$-expansion for the nucleon spin sum rules can be shifted down to rather low $Q\simeq\Lambda_{QCD}$ leading to a good description of recent proton, neutron, deuteron and Bjorken sum rule data at all accessible $Q^2$.
Pasechnik Roman
Soffer Jacques
Teryaev Oleg
No associations
LandOfFree
Nucleon spin structure at low momentum transfers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nucleon spin structure at low momentum transfers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nucleon spin structure at low momentum transfers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-441747