SusHi Bento: Beyond NNLO and the heavy-top limit

TL;DR

SusHi Bento enhances Higgs production predictions by incorporating higher-order QCD corrections, soft expansions, and heavy-quark effects, enabling more precise cross-section calculations beyond previous limits.

Contribution

It introduces new features like N$^3$LO corrections, soft expansion, and heavy-quark effects, significantly improving Higgs production cross-section accuracy.

Findings

Provides Higgs cross-section at 125 GeV as 48.28 pb at 13 TeV

Includes N$^3$LO corrections and soft expansion techniques

Enables study of dimension-5 operator effects

Abstract

Version 1.6.0 of the code SusHi is presented. Concerning inclusive CP-even Higgs production in gluon fusion, the following new features with respect to previous versions have been implemented: expansion of the partonic cross section in the soft limit, i.e. around $x=M_H^2/\hat{s}\to 1$; N$^3$LO QCD corrections in terms of the soft expansion; top-quark mass suppressed terms through NNLO; matching to the cross section at $x\to 0$ through N$^3$LO. For CP-even and -odd scalars, an efficient evaluation of the renormalization-scale dependence is included, and effects of dimension-5 operators can be studied, which we demonstrate for the SM Higgs boson and for a CP-even scalar with a mass of $750$ GeV. In addition, as a generalization of the previously available $b\bar{b}\to H$ cross section, SusHi 1.6.0 provides the cross section for charged and neutral Higgs production in the annihilation of arbitrary heavy quarks. At fixed order in perturbation theory, SusHi thus allows to obtain Higgs cross-section predictions in different models to the highest precision known today. For the SM Higgs boson of $M_H=125$ GeV, SusHi yields $48.28$ pb for the gluon-fusion cross section at the LHC at $13$ TeV. Simultaneously, SusHi provides the renormalization-scale uncertainty of $\pm 1.97$ pb.