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SUMMARY:NLO QCD corrections to diphoton-plus-jet production through gluon 
 fusion at the LHC - Ryan Moodie (Durham University)
DTSTART:20220201T160000Z
DTEND:20220201T170000Z
UID:TALK167522@talks.cam.ac.uk
CONTACT:Heribertus Bayu Hartanto
DESCRIPTION:To match the increasing precision of modern collider experimen
 ts\,\ntheory must aim to achieve percent-level QCD predictions. This pushe
 s\nfor NNLO contributions to two-to-three processes\, whose rich kinematic
 s\noffer many attractive probes of SM parameters. This is a major\ntheoret
 ical challenge that novel methods are being developed for. I\nwill discuss
  recent progress in the diphoton-plus-jet channel.\n\nDiphoton-plus-jet pr
 oduction is an important background for measuring\nproperties of the Higgs
  at the LHC. The gluon-initiated channel is also\nan excellent testing gro
 und for new technologies. We recently computed\nthe NLO QCD corrections to
  this process. Analytic forms for the full-\ncolour two-loop virtual corre
 ctions were found using reconstruction\nover finite fields of the rational
  coefficients of special functions in\nthe pentagon function basis. We com
 bined these with one-loop real\nradiation using the antenna subtraction sc
 heme to compute differential\ndistributions\, observing significant NLO co
 rrections. For the real\ncorrection\, we also showed in a separate study t
 hat efficient\nevaluation can be achieved using amplitude neural networks 
 to emulate\nthe matrix element.
LOCATION:Ryle Seminar Room
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