NNLO QCD corrections to pp → γ * γ * in the large N F limit

Anastasiou, Charalampos; Cancino, Julián; Chavez, Federico; Duhr, Claude; Lazopoulos, Achilleas; Mistlberger, Bernhard; Müller, Romain

Abstract

We compute the NNLO QCD corrections for the hadroproduction of a pair of off-shell photons in the limit of a large number of quark flavors. We perform a reduction of the two-loop amplitude to master integrals and calculate the latter analytically as a Laurent series in the dimensional regulator using modern integration methods. Real radiation corrections are evaluated numerically with a direct subtraction of infrared limits which we cast in a simple factorized form. The results presented here constitute a gauge invariant part of the full NNLO corrections but are not necessarily dominant. We view this calculation as a step towards a complete computation. Our partial corrections to the total cross-section are about 1%–3% and vary with the virtuality of the two off-shell photons.

Citation

Anastasiou, C., Cancino, J., Chavez, F., Duhr, C., Lazopoulos, A., Mistlberger, B., & Müller, R. (2015). NNLO QCD corrections to pp → γ * γ * in the large N F limit. Journal of High Energy Physics, 2015(2), Article 182. https://doi.org/10.1007/jhep02%282015%29182

• Journal Article Type: Article
• Acceptance Date: Feb 2, 2015
• Online Publication Date: Feb 27, 2015
• Publication Date: Feb 27, 2015
• Deposit Date: Apr 8, 2019
• Publicly Available Date: Apr 9, 2019
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2015
• Issue: 2
• Article Number: 182
• DOI: https://doi.org/10.1007/jhep02%282015%29182
• Public URL: https://durham-repository.worktribe.com/output/1299195