Phys. Rev. D 80, 071501(R) (2009) [4 pages]

Use of dispersion relations in hard exclusive processes and the partonic interpretation of deeply virtual Compton scattering

Abstract

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Gary R. Goldstein^1,* and Simonetta Liuti^2,†
¹Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155, USA
²Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA

Received 18 July 2009; published 19 October 2009

Recently dispersion relations have been applied to hard exclusive processes such as deeply virtual Compton scattering, and a holographic principle was proposed that maps out the generalized parton distributions entering the soft matrix elements for the processes from their values on a given kinematical ridge. We examine possible pitfalls associated with the implicit, direct identification in this approach of the physical hadronic states with colored partons, and suggest an improved treatment of this assumption.

URL:

http://link.aps.org/doi/10.1103/PhysRevD.80.071501

DOI:

10.1103/PhysRevD.80.071501

PACS:

13.60.−r, 11.40.Dw, 11.55.Fv, 11.55.Jy

^*gary.goldstein@tufts.edu

^†sl4y@virginia.edu

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Phys. Rev. D 80, 071501(R) (2009) [4 pages]

Use of dispersion relations in hard exclusive processes and the partonic interpretation of deeply virtual Compton scattering