Next-to-next-to-leading order soft gluon corrections in direct photon production.
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Authors
Kidonakis, Nikolaos
Owens, JF
Abstract
Previous work on soft-gluon resummation for direct photon production is extended to include additional
subleading logarithmic terms through O(
3s
) and some representative comparisons are made
to experimental results from the E-706 and UA-6 Collaborations. The additional terms are small
in magnitude, indicating good convergence properties to the level of accuracy calculated. The scale
dependence remains much smaller than that of the next-to-leading-order calculation.
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HEP, Cavendish Laboratory, University of Cambridge