kt Effects in Direct-Photon Production

Details kt Effects in Direct-Photon Production kt Effects in Direct-Photon Production

1998-08-28

arxiv.org/abs/hep-ph/9808467v1

Phys.Rev. D59 (1999) 074007

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, uses revtex and epsf, 37 pages, 15 figures

Scientific paper

10.1103/PhysRevD.59.074007

We discuss the phenomenology of initial-state parton-kt broadening in direct-photon production and related processes in hadron collisions. After a brief summary of the theoretical basis for a Gaussian-smearing approach, we present a systematic study of recent results on fixed-target and collider direct-photon production, using complementary data on diphoton and pion production to provide empirical guidance on the required amount of kt broadening. This approach provides a consistent description of the observed pattern of deviation of next-to-leading order QCD calculations relative to the direct-photon data, and accounts for the shape and normalization difference between fixed-order perturbative calculations and the data. We also discuss the uncertainties in this phenomenological approach, the implications of these results on the extraction of the gluon distribution of the nucleon, and the comparison of our findings to recent related work.

Affiliated with

Also associated with

No associations

Rating

kt Effects in Direct-Photon Production does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with kt Effects in Direct-Photon Production, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and kt Effects in Direct-Photon Production will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-411746