Analytical Method for Next-to-Leading-Order QCD Corrections to Double-Higgs Production

Bonciani, Roberto; Degrassi, Giuseppe; Giardino, Pier Paolo; Gröber, Ramona

Abstract

We propose a new method to calculate analytically higher-order perturbative corrections and we apply it to the calculation of the two-loop virtual corrections to Higgs pair production through gluon fusion. The method is based on the expansion of the amplitudes in terms of a small Higgs transverse momentum. This approach gives a very good approximation (better than per mille) of the partonic cross section in the centerof-mass energy region ffiffi sˆ p ≲ 750 GeV, where ∼95% of the total hadronic cross section is concentrated. The presented method is general and can be applied in a straightforward way to the computation of virtual higher-order corrections to other 2 → 2 processes, representing an improvement with respect to calculations based on heavy mass expansions.

Citation

Bonciani, R., Degrassi, G., Giardino, P. P., & Gröber, R. (2018). Analytical Method for Next-to-Leading-Order QCD Corrections to Double-Higgs Production. Physical Review Letters, 121(16), Article 162003. https://doi.org/10.1103/physrevlett.121.162003

• Journal Article Type: Article
• Online Publication Date: Oct 19, 2018
• Publication Date: Oct 19, 2018
• Deposit Date: Oct 23, 2018
• Publicly Available Date: Oct 23, 2018
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 121
• Issue: 16
• Article Number: 162003
• DOI: https://doi.org/10.1103/physrevlett.121.162003
• Public URL: https://durham-repository.worktribe.com/output/1315669