Four photon production at the LHC: an application of 2->4 analytic unitarity

Abstract

We present Next-to-Leading Order (NLO) predictions for $\gamma \gamma \gamma \gamma$ final states, including the effects of photon fragmentation. Our results are calculated fully analytically using the techniques of $D$-dimensional unitarity, and we discuss some refinements to existing methods, focusing particularly on the role of three-mass triangle coefficients. Using these techniques we are able to produce a numerically stable Monto Carlo code that runs fully in double precision. We investigate the $4\gamma$ signal at colliders, both for Run II of the LHC and at future machines. Our results are implemented in MCFM.

12 pages, 5 figures, 1 table

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Cited by in corpus (1)

• Accelerating LHC phenomenology with analytic one-loop amplitudes: A C++ interface to MCFM