Linking Parton Distributions to Form Factors and Compton Scattering

Details Linking Parton Distributions to Form Factors and Compton Scattering Linking Parton Distributions to Form Factors and Compton Scattering

1998-11-05

arxiv.org/abs/hep-ph/9811253v2

Eur.Phys.J.C8:409-434,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

47 pages, 9 figures (uses epsfig, feynmp); minor changes: typo in (81) and (84) corrected, 2 references added; version to be p

Scientific paper

10.1007/s100529901100

We relate ordinary and skewed parton distributions to soft overlap contributions to elastic form factors and large angle Compton scattering, using light-cone wave functions in a Fock state expansion of the nucleon. With a simple ansatz for the wave functions of the three lowest Fock states we achieve a good description of unpolarised and polarised parton distributions at large x, and of the data for the Dirac form factor and for Compton scattering, both of which can be saturated with soft contributions only. Large angle Compton scattering appears as a good case to investigate the relative importance of soft and hard contributions in exclusive processes which are sensitive to the end point regions of the nucleon wave function.

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