Conference paper

Virtual Compton scattering at low energy and the generalized polarizabilities of the nucleon

H. Fonvieille (for the Jefferson Lab Hall A Collaboration and the VCS Collaboration) ; Laboratoire de Physique Corpusculaire IN2P3/CNRS, Université Blaise Pascal - Clermont II, 63170 AUBIERE Cedex, FRANCE

Abstract

Virtual Compton scattering (VCS) γ ∗p → γp at low CM energy gives access to the generalized polarizabilities of the nucleon. These observables generalize the concept of electromagnetic polarizabilities to the case of a virtual photon. Dedicated VCS experiments have been performed at MAMI, Jefferson Lab and MIT-Bates. The experimental status is reviewed, including methods of analysis and physical results. The measurement of absolute (ep → epγ) cross sections allows the extraction of the two unpolarized VCS structure functions PLL − PTT/ǫ and PLT, which are combinations of the generalized polarizabilities of the proton. Future prospects in the field of VCS at low energy are also presented.

Keywords

virtual Compton scattering; cross sections; nucleon generalized polarizabilities

Hrčak ID:

305623

URI

https://hrcak.srce.hr/305623

Publication date:

1.3.2004.

Article data in other languages: croatian

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