Virtual Compton Scattering and Generalized Polarizabilities of the Proton

Details Virtual Compton Scattering and Generalized Polarizabilities of the Proton Virtual Compton Scattering and Generalized Polarizabilities of the Proton

1996-05-22

arxiv.org/abs/nucl-th/9605031v1

Nucl.Phys.A591:606-638,1995

Physics

Nuclear Physics

Nuclear Theory

45 page postscript file including 2 figures (length just over 1Mb); also available at http://www.physics.adelaide.edu.au/the

Scientific paper

10.1016/0375-9474(95)00217-O

Threshold photon electroproduction off the proton allows one to measure new electromagnetic observables which generalise the usual polarisabilities. There are -- a priori -- ten "generalised polarisabilities", functions of the virtual photon mass. The purpose of this paper is to lay down the appropriate formalism to extract these quantities from the photon electroproduction cross sections. We also give a first estimate of the generalised polarisabilities in the non relativistic quark model.

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