Deeply virtual Compton scattering

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.7114· OSTI ID:656097

Ji, X ^[1]

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1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)

We study in QCD the physics of deeply virtual Compton scattering (DVCS){emdash}the virtual Compton process in the large s and small t kinematic region. We show that DVCS can probe a new type of {ital off-forward} parton distributions. We derive an Altarelli-Parisi-type of evolution equations for these distributions. We also derive their sum rules in terms of nucleon form factors of the twist-two quark and gluon operators. In particular, we find that the second sum rule is related to fractions of the nucleon spin carried separately by quarks and gluons. We estimate the cross section for DVCS and compare it with the accompanying Bethe-Heitler process at CEBAF and HERMES kinematics. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: University of Maryland
• DOE Contract Number: FG02-93ER40762; FC02-94ER40818
• OSTI ID: 656097
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COMPTON EFFECT
CROSS SECTIONS
DISTRIBUTION
FORM FACTORS
GLUONS
NUCLEONS
PARTON MODEL
PARTONS
QUANTUM CHROMODYNAMICS
QUARKS
SCATTERING
SPIN
SUM RULES