Triphoton production at hadron colliders

Abstract

We present next-to-leading order predictions for the production of triphoton final states at the LHC and the Tevatron. Our results include the effect of photon fragmentation for the first time and we are able to quantify the impact of different isolation prescriptions. We find that calculations accounting for fragmentation effects at leading order, and those employing a smooth cone isolation where no fragmentation contribution is required, are in reasonable agreement with one another. However, larger differences in the predicted rates arise when higher order corrections to the fragmentation functions are included. In addition we present full analytic results for the $\gamma \gamma \gamma$ and $\gamma \gamma +$jet one-loop amplitudes. These amplitudes, which are particularly compact, may be useful to future higher-order calculations. Our results are available in the Monte Carlo code MCFM.

16 pages, 4 figures

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Cited by in corpus (3)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Bounding the Higgs width at the LHC
• Four photon production at the LHC: an application of 2->4 analytic unitarity