6533b7d5fe1ef96bd126538d
RESEARCH PRODUCT
Single Spin Asymmetry Parameter from Deeply Virtual Compton Scattering of Hadrons up to Twist-3 accuracy: I. Pion case
S. NogueraDaniele BinosiR. MedranoI.v. AnikinVicente Ventosubject
PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsmedia_common.quotation_subjectHadronCompton scatteringFOS: Physical sciencesPartonElectron01 natural sciencesAsymmetryHigh Energy Physics - PhenomenologyPionHigh Energy Physics - Phenomenology (hep-ph)FactorizationQuantum electrodynamics[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]0103 physical sciencesHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsSpin-½media_commondescription
The study of deeply virtual Compton scattering has shown that electromagnetic gauge invariance requires, to leading order, not only twist two but additional twist three contributions. We apply this analysis and, using the Ellis-Furmanski-Petronzio factorization scheme, compute the single (electron) spin asymmetry arising in the collision of longitudinally polarized electrons with hadrons up to twist 3 accuracy. In order to simplify the kinematics we restrict the actual calculation to pions in the chiral limit. The process is described in terms of the generalized parton distribution functions which we obtain within a bag model framework.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-01-01 |