Top tree amplitudes for higher order calculations

Campbell, John M.; Ellis, R. Keith

Abstract

We present compact analytic results for tree-level amplitudes containing a tt¯ pair accompanied by up to four massless partons, tt¯gg, tt¯ggg, tt¯gggg, tt¯qq¯, tt¯qq¯g, tt¯qq¯gg and tt¯qq¯q′q¯′. The results, obtained using BCFW on-shell recursion, are based both on previous published results and on the new calculations performed in this paper. These amplitudes are sufficient to calculate the production of a tt¯ pair and zero, one, or two light parton jets, with the option to include the tree-level decays t → bνe+ and t¯ → b¯e−ν¯ efficiently. Our results are part of the NNLO corrections to tt¯ production including the decay correlations for on-shell top quarks.

Citation

Campbell, J. M., & Ellis, R. K. (2023). Top tree amplitudes for higher order calculations. Journal of High Energy Physics, 2023(10), Article 125. https://doi.org/10.1007/jhep10%282023%29125

• Journal Article Type: Article
• Acceptance Date: Oct 13, 2023
• Online Publication Date: Oct 20, 2023
• Publication Date: Oct 20, 2023
• Deposit Date: Jan 8, 2024
• Publicly Available Date: Jan 8, 2024
• 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: 2023
• Issue: 10
• Article Number: 125
• DOI: https://doi.org/10.1007/jhep10%282023%29125
• Keywords: Higher-Order Perturbative Calculations, Top Quark, Scattering Amplitudes
• Public URL: https://durham-repository.worktribe.com/output/2116566