TY - JOUR
T1 - Exclusive electroproduction revisited
T2 - Treating kinematical effects
AU - Belitsky, Andrei
AU - Müller, D.
PY - 2010/10/8
Y1 - 2010/10/8
N2 - Generalized parton distributions of the nucleon are accessed via exclusive leptoproduction of the real photon. While earlier analytical considerations of phenomenological observables were restricted to twist-three accuracy, i.e., taking into account only terms suppressed by a single power of the hard scale, in the present study we revisit this differential cross section within the helicity formalism and restore power-suppressed effects stemming from the process kinematics exactly. We restrict ourselves to the phenomenologically important case of lepton scattering off a longitudinally polarized nucleon, where the photon flips its helicity at most by one unit.
AB - Generalized parton distributions of the nucleon are accessed via exclusive leptoproduction of the real photon. While earlier analytical considerations of phenomenological observables were restricted to twist-three accuracy, i.e., taking into account only terms suppressed by a single power of the hard scale, in the present study we revisit this differential cross section within the helicity formalism and restore power-suppressed effects stemming from the process kinematics exactly. We restrict ourselves to the phenomenologically important case of lepton scattering off a longitudinally polarized nucleon, where the photon flips its helicity at most by one unit.
UR - http://www.scopus.com/inward/record.url?scp=78651090722&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651090722&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.82.074010
DO - 10.1103/PhysRevD.82.074010
M3 - Article
AN - SCOPUS:78651090722
SN - 1550-7998
VL - 82
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 074010
ER -