arXiv subjects

L. E. Gordon

Publications and source records attributed to L. E. Gordon.

20 records · Page 2Linked to original sources

arXiv1996

Polarized Double Photon Production in QCD to Order $α_s$

We present a complete order $α_s$ analysis of the process $p p\to γγ+ X$ with polarized initial states, previously studied by us with leading order structure functions. We include in our calculation new sets of parton densities evolved in NLO QCD, such as those of Gehrmann and Stirling and of Glück et al., which incorporate the new anomalous dimensions of Mertig and Van Neerven in the evolution equation. A detailed phenomenological analysis is also given which includes the photon isolation. Our results indicate that the asymmetries, although not very large, should be substantial enough at RHIC energies to be measurable in future planned experiments.

hep-ph↗

arXiv1995

Analytic Calculation of Prompt Photon plus Associated Heavy Flavor at Next-to-Leading Order in QCD

Contributions through second order, $O(α^2_s)$, in perturbative quantum chromodynamics are calculated analytically for inclusive associated production of a prompt photon and a charm quark at large values of transverse momentum in high energy hadron-hadron collisions. Seven partonic subprocesses contribute at order $α^2_s$. We find important corrections to the lowest order, $O(α_s)$, subprocess $c g \rightarrow γc$. We demonstrate to what extent data from $p +\bar{p}\rightarrow γ+ c + X$ may serve to measure the charm quark density in the nucleon.

hep-ph↗