The one-loop amplitudes for Higgs + 4 partons with full mass effects

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

doi:10.1007/jhep05(2020)079

The one-loop amplitudes for Higgs + 4 partons with full mass effects

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

Authors

Lucy Budge lucy.budge@durham.ac.uk
PGR Student Doctor of Philosophy

John M. Campbell

Giuseppe De Laurentis

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

Satyajit Seth

Abstract

We present compact analytic formulae for the one-loop amplitudes for Higgs + 4 parton scattering, 0 → ggggh, 0 → qqggh ¯ and 0 → qq¯ q¯ 0 q 0h, mediated by a loop of massive coloured quarks. We exploit the correspondence with a theory in which a massive coloured scalar circulates in the loop to avoid a proliferation in the number of terms in the result. In addition, we use momentum twistors and high precision numerical evaluations to simplify the expressions. The analytic results in this paper, in terms of spinor products, allow construction of an efficient numerical program to calculate the amplitude.

Citation

Budge, L., Campbell, J. M., De Laurentis, G., Ellis, R. K., & Seth, S. (2020). The one-loop amplitudes for Higgs + 4 partons with full mass effects. Journal of High Energy Physics, 2020(5), Article 79. https://doi.org/10.1007/jhep05%282020%29079

Journal Article Type	Article
Acceptance Date	Apr 10, 2020
Online Publication Date	May 18, 2020
Publication Date	May 31, 2020
Deposit Date	May 21, 2020
Publicly Available Date	May 22, 2020
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	2020
Issue	5
Article Number	79
DOI	https://doi.org/10.1007/jhep05%282020%29079

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