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Two-loop mixed QCD-EW corrections to gg → Hg

Bonetti, Marco; Panzer, Erik; Smirnov, Vladimir A.; Tancredi, Lorenzo

We compute the two-loop mixed QCD-Electroweak (QCD-EW) corrections to the production of a Higgs boson and a gluon in gluon fusion through a loop of light quarks. The relevant four-point functions with internal massive propagators are expressed as multiple polylogarithms with algebraic arguments. We perform the calculation by integration over Feynman parameters and, independently, by the method of differential equations. We compute the two independent helicity amplitudes for the process and we find that they are both finite. Moreover, we observe a weight drop when all gluons have the same helicity. We also provide a simplified expression for the all-plus helicity amplitude, which is optimised for fast and reliable numerical evaluation in the physical region.

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Verlagsausgabe §
DOI: 10.5445/IR/1000129885
Veröffentlicht am 19.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2020
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000129885
Erschienen in Journal of high energy physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2020
Heft 11
Seiten Art.-Nr.: 45
Vorab online veröffentlicht am 10.11.2020
Schlagwörter NLO Computations, QCD Phenomenology
Nachgewiesen in Scopus
Web of Science
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