NLO QCD corrections to diphoton-plus-jet production through gluon fusion at the LHC

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• Ryan Moodie (Durham University)
• Tuesday 01 February 2022, 16:00-17:00
• Ryle Seminar Room.

If you have a question about this talk, please contact Heribertus Bayu Hartanto.

To match the increasing precision of modern collider experiments, theory must aim to achieve percent-level QCD predictions. This pushes for NNLO contributions to two-to-three processes, whose rich kinematics offer many attractive probes of SM parameters. This is a major theoretical challenge that novel methods are being developed for. I will discuss recent progress in the diphoton-plus-jet channel.

Diphoton-plus-jet production is an important background for measuring properties of the Higgs at the LHC . The gluon-initiated channel is also an excellent testing ground for new technologies. We recently computed the NLO QCD corrections to this process. Analytic forms for the full- colour two-loop virtual corrections were found using reconstruction over finite fields of the rational coefficients of special functions in the pentagon function basis. We combined these with one-loop real radiation using the antenna subtraction scheme to compute differential distributions, observing significant NLO corrections. For the real correction, we also showed in a separate study that efficient evaluation can be achieved using amplitude neural networks to emulate the matrix element.

This talk is part of the Cavendish HEP Seminars series.

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• All Cavendish Laboratory Seminars
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• Cavendish HEP Seminars
• Centre for Health Leadership and Enterprise
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• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
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