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Title: Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering

Abstract

A next-to-leading-order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton-nucleon scattering is presented within the framework of the radiative parton model. A consistent NLO formulation of the {ital Q}{sup 2} evolution of polarized parton distributions yields two sets of plausible NLO spin-dependent parton distributions in the conventional MS factorization scheme. They respect the fundamental positivity constraints down to the low resolution scale {ital Q}{sup 2}={mu}{sup 2}{sub NLO}=0.34 GeV{sup 2}. The {ital Q}{sup 2} dependence of the spin asymmetries {ital A}{sup {ital p},{ital n},{ital d}}{sub 1}({ital x},{ital Q}{sup 2}) is similar to the leading-order (LO) one in the range 1{le}{ital Q}{sup 2}{le}20 GeV{sup 2} and is shown to be non-negligible for {ital x} values relevant for the analysis of the present data and possibly forthcoming data at DESY HERA. {copyright} {ital 1996 The American Physical Society.}

Authors:
; ;  [1];  [2]
  1. Universitaet Dortmund, Institut fuer Physik, D-44221 Dortmund (Germany)
  2. Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (England)
Publication Date:
OSTI Identifier:
284041
Resource Type:
Journal Article
Journal Name:
Physical Review, D
Additional Journal Information:
Journal Volume: 53; Journal Issue: 9; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; PARTON MODEL; LEPTON-NUCLEON INTERACTIONS; DEEP INELASTIC SCATTERING; POLARIZED BEAMS; QUANTUM CHROMODYNAMICS; STRUCTURE FUNCTIONS; SPIN; DISTRIBUTION; FACTORIZATION; MOMENTUM TRANSFER; ASYMMETRY

Citation Formats

Glueck, M., Reya, E., Stratmann, M., and Vogelsang, W.. Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering. United States: N. p., 1996. Web. doi:10.1103/PhysRevD.53.4775.
Glueck, M., Reya, E., Stratmann, M., & Vogelsang, W.. Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering. United States. doi:10.1103/PhysRevD.53.4775.
Glueck, M., Reya, E., Stratmann, M., and Vogelsang, W.. Wed . "Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering". United States. doi:10.1103/PhysRevD.53.4775.
@article{osti_284041,
title = {Next-to-leading-order radiative parton model analysis of polarized deep inelastic lepton-nucleon scattering},
author = {Glueck, M. and Reya, E. and Stratmann, M. and Vogelsang, W.},
abstractNote = {A next-to-leading-order QCD analysis of spin asymmetries and structure functions in polarized deep inelastic lepton-nucleon scattering is presented within the framework of the radiative parton model. A consistent NLO formulation of the {ital Q}{sup 2} evolution of polarized parton distributions yields two sets of plausible NLO spin-dependent parton distributions in the conventional MS factorization scheme. They respect the fundamental positivity constraints down to the low resolution scale {ital Q}{sup 2}={mu}{sup 2}{sub NLO}=0.34 GeV{sup 2}. The {ital Q}{sup 2} dependence of the spin asymmetries {ital A}{sup {ital p},{ital n},{ital d}}{sub 1}({ital x},{ital Q}{sup 2}) is similar to the leading-order (LO) one in the range 1{le}{ital Q}{sup 2}{le}20 GeV{sup 2} and is shown to be non-negligible for {ital x} values relevant for the analysis of the present data and possibly forthcoming data at DESY HERA. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevD.53.4775},
journal = {Physical Review, D},
number = 9,
volume = 53,
place = {United States},
year = {1996},
month = {5}
}