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$W\gamma$ production at NNLO+PS accuracy in GENEVA

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arxiv 2105.13214 v1 pith:KGEOVWRI submitted 2021-05-27 hep-ph

classification hep-ph
keywords accuracycalculationnnlofixed-ordergammagenevanext-to-next-to-leadingpredictions
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present an event generator for the process $pp\to \ell\nu_\ell\gamma$ at next-to-next-to-leading order (NNLO) in QCD and matched to the PYTHIA8 parton shower. The calculation makes use of the GENEVA framework, which combines a resummed calculation obtained via Soft-Collinear Effective Theory (SCET) with the fixed-order result. We validate the NNLO accuracy of our results by comparing predictions for inclusive quantities with an independent fixed-order calculation, and then present the resummed 0-jettiness spectrum at next-to-next-to-leading logarithmic (NNLL$'$) accuracy. Finally, we compare our predictions against data collected by the ATLAS experiment at the Large Hadron Collider during its 7 TeV run, finding good agreement.

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  1. Resumming transverse observables for NNLO+PS matching in GENEVA

    hep-ph 2025-05 conditional novelty 6.0 of 10

    A GENEVA NNLO+PS generator for b bbar H and c cbar H is built with qT resummation at N3LL and the first NLL' resummation of a transverse-measure one-jettiness.

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