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

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

doi:10.1103/physrevlett.121.162003

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

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

Authors

Roberto Bonciani

Giuseppe Degrassi

Pier Paolo Giardino

Ramona Gröber

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

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