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10-12 April 2019
Denver, CO
US/Mountain timezone

Exclusive Backward-Angle Meson Electroproduction -- Unique access to u-channel physics

12 Apr 2019, 11:20
20m
Director's Row I (Denver, CO)

Director's Row I

Denver, CO

Sheraton Denver Downtown Hotel, 1550 Court Pl. lobby level of the Plaza building
contributed talk GPDs andTMDs

Speaker

Prof. Garth Huber (University of Regina)

Description

Exclusive meson electroproduction at different squared four-momenta of the exchanged virtual photon, Q^2, and at different four-momentum transfers, t and u, can be used to probe QCD's transition from hadronic degrees of freedom at long distance scale to quark-gluon degrees of freedom at short distance scale. Backward-angle meson electroproduction was previously ignored, but is anticipated to offer complimentary information to conventional forward-angle meson electroproduction studies on nucleon structure. The results of our pioneering study of backward-angle omega cross sections through the exclusive p(e,e'p)omega reaction will be presented. The experiment was performed as part of E01-004 in Jefferson Lab Hall C, with central $Q^2$ values of 1.60 and 2.45 GeV^2, and W=2.21 GeV. The extracted cross sections were separated into transverse (T), longitudinal (L), and LT, TT interference terms. The data set has a unique coverage of u~0, opening up a new means to study the transition of the nucleon wave function through backward-angle experimental observables. Plans to extend these studies to the pi^0 channel will also be presented.

Primary author

Prof. Garth Huber (University of Regina)

Co-author

Dr Wenliang (Bill) Li (College of William and Mary)

Presentation Materials