Abstract
We present results from the initial run of Fermilab experiment E706. The data include incident and beams at 500 GeV/c on Be and Cu targets, and span the kinematic ranges of transverse momentum and rapidity of GeV/c and , respectively. We have measured cross sections for and direct-photon production, as well as the production ratio. From the data on Be and Cu, we have extracted the nuclear dependence of production, parametrized as . The cross sections are compared with next-to-leading-log QCD predictions for different choices of the QCD momentum scales and several sets of parton distribution functions.
- Received 28 December 1992
DOI:https://doi.org/10.1103/PhysRevD.48.5
©1993 American Physical Society