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

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
• Electronic ISSN: 1029-8479
• 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
• Public URL: https://durham-repository.worktribe.com/output/1301725