Photoproduction of High pT Jets
University of Maryland is one of four major institutes collaborating on
Experiment 683 at Fermilab. This experiment studied the photoproductio of high
transverse (pT) jets from the interaction of tagged 50 to 400 GeV photons
with proton and nuclear targets. Data were also acquired with pions in the
energy range 180 to 400 GeV/c. At high pT, the interaction of photons with
a nucleon is expected to be dominated by two distinct subprocesses:
QCD compton scattering and
photon-gluon fusion. These point-like direct couplings
of photon to quarks and gluons provide a unique probe of the parton
distributions and their propagation through nuclear medium.
All data taking for this experiment was completed in 1992, and data analysis
is primarily being carried out at University of Maryland, Rice University, and
Fermilab. Physics results have been published on the first observation of
jet production by the real photons (D. Adams et al., Phys. Rev. Lett.
72, 2337 (1994)) and on the
A-dependence of the azimuthal opening
angle between two high pT jets (D. Naples et al., Phys. Rev. Lett.
72, 2341 (1994)).
