The pp → W(→ lν) + γ process at next-to-next-to-leading order

Campbell, John M.; De Laurentis, Giuseppe; Ellis, R. Keith; Seth, Satyajit

doi:10.1007/jhep07(2021)079

The pp → W(→ lν) + γ process at next-to-next-to-leading order

Campbell, John M.; De Laurentis, Giuseppe; Ellis, R. Keith; Seth, Satyajit

Authors

John M. Campbell

Giuseppe De Laurentis

Professor Keith Ellis keith.ellis@durham.ac.uk
Emeritus Professor

Satyajit Seth

Abstract

We present details of the calculation of the pp → W(→ lν)γ process at next-to-next-to-leading order in QCD, calculated using the jettiness slicing method. The calculation is based entirely on analytic amplitudes. Because of the radiation zero, the NLO QCD contribution from the gq channel is as important as the contribution from the Born qq¯¯ process, disrupting the normal counting of leading and sub-leading contributions. We also assess the importance of electroweak (EW) corrections, including the EW corrections to both the six-parton channel 0 → u¯¯¯dνe+γg and the five-parton channel 0 → u¯¯¯dνe+γ. Previous experimental results have been shown to agree with theoretical predictions, taking into account the large experimental errors. With the advent of run II data from the LHC, the statistical errors on the data will decrease, and will be competitive with the error on theoretical predictions for the first time. We present numerical results for s√ = 7 and 13 TeV. Analytic results for the one-loop six-parton QCD amplitude and the tree-level seven-parton QCD amplitude are presented in appendices.

Citation

Campbell, J. M., De Laurentis, G., Ellis, R. K., & Seth, S. (2021). The pp → W(→ lν) + γ process at next-to-next-to-leading order. Journal of High Energy Physics, 2021(7), https://doi.org/10.1007/jhep07%282021%29079

Journal Article Type	Article
Acceptance Date	Jun 29, 2021
Online Publication Date	Jul 13, 2021
Publication Date	2021
Deposit Date	Nov 9, 2021
Publicly Available Date	Nov 9, 2021
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Electronic ISSN	1029-8479
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	2021
Issue	7
DOI	https://doi.org/10.1007/jhep07%282021%29079

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