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Nucleon spin structure at low momentum transfers

Pasechnik, Roman S. LU ; Soffer, Jacques and Teryaev, Oleg V. (2010) In Physical Review D (Particles, Fields, Gravitation and Cosmology) 82(7).
Abstract

The generalized Gerasimov-Drell-Hearn sum rule is known to be very sensitive to QCD radiative and power corrections. We improve the previously developed QCD-inspired model for the Q2 dependence of the Gerasimov-Drell-Hearn 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 Γ1p(Q2) and on the Bjorken sum rule Γ1p-n(Q2). By using the singularity-free analytic perturbation theory we demonstrate that the matching point between chiral-like positive-Q2 expansion and QCD operator product 1/Q2 expansion for the nucleon spin sum rules can be shifted down to rather low QΛQCD leading to a... (More)

The generalized Gerasimov-Drell-Hearn sum rule is known to be very sensitive to QCD radiative and power corrections. We improve the previously developed QCD-inspired model for the Q2 dependence of the Gerasimov-Drell-Hearn 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 Γ1p(Q2) and on the Bjorken sum rule Γ1p-n(Q2). By using the singularity-free analytic perturbation theory we demonstrate that the matching point between chiral-like positive-Q2 expansion and QCD operator product 1/Q2 expansion for the nucleon spin sum rules can be shifted down to rather low QΛQCD leading to a good description of recent proton, neutron, deuteron, and Bjorken sum rule data at all accessible Q2. © 2010 The American Physical Society.

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author
organization
publishing date
type
Contribution to journal
publication status
published
in
Physical Review D (Particles, Fields, Gravitation and Cosmology)
volume
82
issue
7
publisher
American Physical Society
external identifiers
  • Scopus:78651086794
ISSN
1550-7998
DOI
10.1103/PhysRevD.82.076007
language
English
LU publication?
yes
id
4a40d51a-e450-44af-82a6-af02c24adbcf
date added to LUP
2016-08-18 21:09:01
date last changed
2016-12-04 04:53:26
@misc{4a40d51a-e450-44af-82a6-af02c24adbcf,
  abstract     = {<p>The generalized Gerasimov-Drell-Hearn sum rule is known to be very sensitive to QCD radiative and power corrections. We improve the previously developed QCD-inspired model for the Q2 dependence of the Gerasimov-Drell-Hearn 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 Γ1p(Q2) and on the Bjorken sum rule Γ1p-n(Q2). By using the singularity-free analytic perturbation theory we demonstrate that the matching point between chiral-like positive-Q2 expansion and QCD operator product 1/Q2 expansion for the nucleon spin sum rules can be shifted down to rather low QΛ<sub>QCD</sub> leading to a good description of recent proton, neutron, deuteron, and Bjorken sum rule data at all accessible Q2. © 2010 The American Physical Society.</p>},
  author       = {Pasechnik, Roman S. and Soffer, Jacques and Teryaev, Oleg V.},
  issn         = {1550-7998},
  language     = {eng},
  month        = {10},
  number       = {7},
  publisher    = {ARRAY(0xb8badf8)},
  series       = {Physical Review D (Particles, Fields, Gravitation and Cosmology)},
  title        = {Nucleon spin structure at low momentum transfers},
  url          = {http://dx.doi.org/10.1103/PhysRevD.82.076007},
  volume       = {82},
  year         = {2010},
}