Helicity-flip off-forward parton distributions of the nucleon

Journal Article · Tue Sep 01 00:00:00 EDT 1998 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.58.054006· OSTI ID:641568

Hoodbhoy, P; Ji, X ^[1]

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

We identify quark and gluon helicity-flip distributions defined between nucleon states of unequal momenta. The evolution of these distributions with a change of renormalization scale is calculated in the leading-logarithmic approximation. The helicity-flip gluon distributions do not mix with any quark distribution and are thus a unique signature of gluons in the nucleon. Their contribution to the generalized virtual Compton process is obtained both in the form of a factorization theorem and an operator product expansion. In deeply virtual Compton scattering, they can be probed through the distinct angular dependence of the cross section. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 641568
• Journal Information: Physical Review, D, Vol. 58, Issue 5; Other Information: PBD: Sep 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PARTON MODEL
PARTONS
DISTRIBUTION
NUCLEONS
HELICITY
QUARKS
GLUONS
COMPTON EFFECT
FACTORIZATION
OPERATOR PRODUCT EXPANSION
CROSS SECTIONS
LIGHT CONE
STRUCTURE FUNCTIONS