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.
High-energy resummation in direct photon production / G. Diana. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 824:1/2(2010 Jan 01), pp. 154-167. [10.1016/j.nuclphysb.2009.09.001]
High-energy resummation in direct photon production
G. DianaPrimo
2010
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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