Twist-three observables in deeply virtual Compton scattering on the nucleon

Authors
Belitsky, AV Kirchner, A Muller, D Schafer, A
Citation
Av. Belitsky et al., Twist-three observables in deeply virtual Compton scattering on the nucleon, PHYS LETT B, 510(1-4), 2001, pp. 117-124
Citations number
24
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
510
Issue
1-4
Year of publication
2001
Pages
117 - 124
Database
ISI
SICI code
0370-2693(20010621)510:1-4<117:TOIDVC>2.0.ZU;2-Z
Abstract
We study twist-three effects in deeply virtual Compton scattering on an unp olarized spin-1/2 target. A careful definition of observables as Fourier mo ments w.r.t. the azimuthal angle allows for a clear separation of twist-two and -three effects. Although the latter are power suppressed, they give le ading contributions to the twist-three asymmetries and do not affect the tw ist-two observables. (C) 2001 Published by Elsevier Science B.V.