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Nonforward parton densities and soft mechanism for form factors and wide-angle Compton scattering in QCD [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
638 Kilobytes pages : digital, PDF file
Additional Creators
Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The authors argue that at moderately large momentum transfer −t ≲ 10 GeV², hadronic form factors and wide-angle Compton scattering amplitudes are dominated by mechanism corresponding to overlap of soft wave functions. They show that the soft contribution in both cases can be described in terms of the same universal nonforward parton densities (ND's) F(x;t), which are the simplest hybrids of the usual parton densities and hadronic form factors. They propose a simple model for ND's possessing required reduction properties. Their model easily reproduces the observed magnitude and the dipole t-dependence of the proton form factor F₁{sup p}(t) in the region 1 GeV² < −t < 10 GeV². Their results for the wide-angle Compton scattering cross section follow the angular dependence of existing data and are rather close to the data in magnitude.
Report Numbers
E 1.99:doe/er/40150-1487
E 1.99: jlab-thy-98-10
E 1.99: hep-ph/9803316
hep-ph/9803316
jlab-thy-98-10
doe/er/40150-1487
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Note
Published through SciTech Connect.
03/01/1998.
"doe/er/40150-1487"
" jlab-thy-98-10"
" hep-ph/9803316"
Phys.Rev. D58 (1998) 114008 FT
A.V. Radyushkin.
Funding Information
AC05-84ER40150
View MARC record | catkey: 14712159