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)
