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:954480

Ji, Xiangdong

We study in QCD the physics of deeply virtual Compton scattering (DVCS) - the virtual Compton process in the large s and small t kinematic region. We show that DVCS can probe a new type of 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.

• Research Organization: Thomas Jefferson Lab National Accelerator Facility
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 954480
• Report Number(s): JLAB-THY-97-45
• Journal Information: Physical Review D, Journal Name: Physical Review D Vol. 55
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPTON EFFECT
CROSS SECTIONS
FORM FACTORS
GLUONS
NUCLEONS
PHYSICS
QUANTUM CHROMODYNAMICS
QUARKS
SPIN
SUM RULES