Nucleon spin structure at low momentum transfers
(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.
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- author
- Pasechnik, Roman S. LU ; Soffer, Jacques and Teryaev, Oleg V.
- organization
- publishing date
- 2010-10-21
- type
- Contribution to journal
- publication status
- published
- in
- Physical Review D (Particles, Fields, Gravitation and Cosmology)
- volume
- 82
- issue
- 7
- article number
- 076007
- 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
- 2024-04-05 05:01:57
@article{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.</p>}}, author = {{Pasechnik, Roman S. and Soffer, Jacques and Teryaev, Oleg V.}}, issn = {{1550-7998}}, language = {{eng}}, month = {{10}}, number = {{7}}, publisher = {{American Physical Society}}, 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}}, doi = {{10.1103/PhysRevD.82.076007}}, volume = {{82}}, year = {{2010}}, }