6533b7d4fe1ef96bd1262825
RESEARCH PRODUCT
Double deeply virtual Compton scattering off the nucleon.
Marc VanderhaeghenM. Guidalsubject
PhysicsParticle physics[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]010308 nuclear & particles physicsScatteringCompton scatteringGeneral Physics and AstronomyVirtual particleFOS: Physical sciencesParton01 natural sciencesHelicityNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Invariant massHigh Energy Physics::Experiment010306 general physicsNucleonNuclear ExperimentLeptondescription
We study the double deeply virtual Compton scattering (DDVCS) process off the nucleon, through the scattering of a spacelike virtual photon with large virtuality resulting in the production of a timelike virtual photon, decaying into an e^+ e^- pair. This process is expressed in the Bjorken regime in terms of generalized parton distributions (GPDs) and it is shown that by varying the invariant mass of the lepton pair, one can directly extract the GPDs from the observables. We give predictions for the DDVCS cross section and beam helicity asymmetry and discuss its experimental feasibility.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-08-30 | Physical review letters |