202 research outputs found
QED radiative correction to spin-density matrix elements in exclusive vector meson production
QED radiative effects are considered in the case of measurement of
spin-density matrix elements of diffractive -meson electroproduction.
Large radiative correction for is found in the kinematics of
collider experiments at HERA.Comment: 7 pages, 5 figure
Radiative corrections to the structure functions and sum rules in polarized DIS
The one-loop NLO radiative corrections to the observables in polarized DIS
using assumption that a quark is an essential massive particle are considered.
If compared with classical QCD formulae the obtained results are identical for
the unpolarized and different for polarized sum rules, that can be explained as
the influence of the finite quark mass effects on NLO QCD corrections. The
explicit expression for one-loop NLO QCD contribution to the structure function
g_2 is presented.Comment: 6 pages,1 figure. Talk given at the International Workshop "Symmetry
And Spin" - PRAHA-SPIN'9
QED Radiative Corrections in Processes of Exclusive Pion Electroproduction
Formalism for radiative correction (RC) calculation in exclusive pion
electroproduction on the proton is presented. A FORTRAN code EXCLURAD is
developed for the RC procedure. The numerical analysis is done in the
kinematics of current Jefferson Lab experiments.Comment: 13 pages, 9 figures; requires RevTeX
Radiative effects in scattering of polarized leptons by polarized nucleons and light nuclei
Recent developments in the field of radiative effects in polarized
lepton-nuclear scattering are reviewed. The processes of inclusive,
semi-inclusive, diffractive and elastic scattering are considered. The explicit
formulae obtained within the covariant approach are discussed. FORTRAN codes
POLRAD, RADGEN, HAPRAD, DIFFRAD and MASCARAD created on the basis of the
formulae are briefly described. Applications for data analysis of the current
experiments on lepton-nuclear scattering at CERN, DESY, SLAC and TJNAF are
illustrated by numerical results.Comment: 39 pages, 12 figures, contribution to Lepton-Photon 0
Radiative Effects in Processes of Diffractive Vector Meson Electroproduction
The electromagnetic radiative correction to the cross section of the vector
meson electroproduction is calculated. Explicit covariant formulae for the
observed cross section are obtained. The dependence of the radiative correction
on the experimental resolution and on the inelasticity cut is discussed.
FORTRAN code DIFFRAD based on both exact (ultrarelativistic) and approximate
sets of the formulae for the radiative correction to the cross section is
presented. The detailed numerical analysis for kinematical conditions of the
recent experiments on the diffractive electroproduction of vector mesons is
given.Comment: 7 pages, 9 figure
Radiative Effects in the Processes of Hadron Electroproduction
An approach to calculate radiative corrections to unpolarized cross section
of semi-inclusive electroproduction is developed. An explicit formulae for the
lowest order QED radiative correction are presented. Detailed numerical
analysis is performed for the kinematics of experiments at the fixed targets.Comment: 7 pages, 4 figure
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