[Theory-seminars] Theory Seminar. Monday. Room L102. 1pm. Yao Ji

[Raul Briceno]

Theory Center Seminar
Monday, Nov 9, 2015
1:00 p.m. 
CEBAF Center, Room L102

Yao Ji (Arizona State University)

Title: Compton scattering: Deep Virtual to Quasi-Real 

Abstract: We address the question of interpolation of the virtual Compton scattering process off a polarized nucleon target between the deeply virtual regime for the initial state photon and its near on-shell kinematics making use of the photon helicity-dependent Compton Form Factors (CFFs) as a main ingredient of the formalism. We suggest a simple parametrization of the Compton hadronic tensor in terms of CFFs which are free from kinematical singularities. We also provide a relation of our basis spanned by a minimal number of Dirac bilinears to the one introduced by Tarrach for the parametrization of the virtual Compton tensor and utilize the former to establish a set of equalities among our CFFs and Generalized Polarizabilities. As a complementary result, we express Compton scattering in the Born approximation in terms of CFFs as well. 
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