High-energy resummation in direct photon production
Giovanni Diana
TL;DR
This paper develops a high-energy resummation technique for direct photon production in perturbative QCD, addressing collinear singularities and providing improved predictions beyond NNLO.
Contribution
It introduces a consistent method for high-energy resummation in direct photon production, extending predictions to all orders in perturbative QCD.
Findings
Resummation effectively manages collinear singularities.
Comparison shows improved accuracy over fixed order calculations.
Predictions extend to NNLO and higher orders.
Abstract
We present the computation of the direct photon production cross-section in perturbative QCD to all orders in the limit of high partonic center-of-mass energy. We show how the high-energy resummation can be performed consistently in the presence of a collinear singularity in the final state, we compare our results to the fixed order NLO cross-section in MSbar scheme, and we provide predictions at NNLO and beyond.
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