Helicity-Flip Off-Foward Parton Distributions of the Nucleon

Details Helicity-Flip Off-Foward Parton Distributions of the Nucleon Helicity-Flip Off-Foward Parton Distributions of the Nucleon

1998-01-20

arxiv.org/abs/hep-ph/9801369v2

Phys.Rev. D58 (1998) 054006

Physics

High Energy Physics

High Energy Physics - Phenomenology

a few corrections made, references changed

Scientific paper

10.1103/PhysRevD.58.054006

We identify quark and gluon helicity-flip distributions defined between nucleon states of unequal momenta. The evolution of these distributions with 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 distinct angular dependence of the cross section.

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