Limitations on dispersion relations for Generalized Parton Distributions

Details Limitations on dispersion relations for Generalized Parton Distributions Limitations on dispersion relations for Generalized Parton Distributions

2009-08-16

arxiv.org/abs/0908.2215v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures, DIS09 contribution to be published in Proceedings

Scientific paper

Deeply Virtual Compton Scattering and electroproduction of mesons involve amplitudes that are analytic in energy. Analyticity enables Dispersion Relations (DR's) for such amplitudes, relating real and imaginary parts. Lately it has been suggested that DR's be applied to the integrated Generalized Parton Distributions that embody the spin-dependent soft, but factorizable part of the scattering. However, at non-zero momentum transfer, DRs require integration over unphysical regions of the variables. We show that the relevant unphysical region of the non-forward DRs is considerable, vitiating efforts to avoid the actual measurement of the real parts more directly.

Affiliated with

Also associated with

No associations

Rating

Limitations on dispersion relations for Generalized Parton Distributions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Limitations on dispersion relations for Generalized Parton Distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limitations on dispersion relations for Generalized Parton Distributions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-704554