Extracting Spin Dependent Parton Distributions from Deeply Virtual Scattering Processes

Apr 14, 2016, 11:30 AM
15m
SR2 (DESY Hamburg)

SR2

DESY Hamburg

Spin Physics WG6 Spin Physics

Speaker

Prof. Gary Goldstein (Tufts University)

Description

Spin and transverse momentum dependent parton distributions - GPDs, TMDs and GTMDs - are at the interface between the non-perturbative regime of QCD hadron structure and observable quantities. The distributions appear as linear superpositions and convolutions within helicity amplitudes for parton-nucleon scattering processes, which, in turn, occur in amplitudes for leptoproduction processes. The phenomenological extraction of the amplitudes, and hence the distributions, is a challenging task. We will present relations between crucial quark-nucleon or gluon-nucleon helicity amplitudes and the rich array of angular distributions in Deeply Virtual Compton Scattering, Time-like Compton Scattering and novel Multi-hadron photon processes. These provide an important window into the spin structure of the nucleons.

Primary author

Prof. Gary Goldstein (Tufts University)

Co-author

Prof. Simonetta Liuti (University of Virginia)

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