Speaker
nobuo sato
(jlab)
Description
In this talk we will discuss the phenomenology of direct photon production
using theoretical predictions at \emph{next-to-leading order} with
threshold resummation up to \emph{next-to-leading-logarithmic}
accuracy. By analyzing the global data sets of direct photons, we
found good agreement between the theory and the data for a wide
range of energies ($\sqrt{s}=23$ GeV up to $7$ TeV) if we exclude the
data from E706 experiment. We have studied the potential impact of
direct photon data on parton distribution functions using a Bayesian
reweighting approach. A reduction of $10\%$ around $0.3<x<0.6$ is
observed in the uncertainty of the gluon distribution.
Author
nobuo sato
(jlab)
Co-author
Joseph Owens
(Florida State University)
