Full two-loop QCD corrections to the Higgs mass in the MSSM with heavy superpartners

TL;DR

This paper calculates the complete two-loop QCD corrections to the Higgs mass in the MSSM with heavy superpartners, refining theoretical predictions to match experimental precision.

Contribution

It provides the full two-loop threshold corrections involving strong and electroweak couplings, completing the two-loop QCD correction calculation at the SUSY scale.

Findings

New corrections modestly impact Higgs mass predictions

Comparison shows consistency between different Higgs mass calculations

Results align with LHC measurement accuracy

Abstract

We improve the determination of the Higgs-boson mass in the MSSM with heavy superpartners, by computing the two-loop threshold corrections to the quartic Higgs coupling that involve both the strong and the electroweak gauge couplings. Combined with earlier results, this completes the calculation of the two-loop QCD corrections to the quartic coupling at the SUSY scale. We also compare different computations of the relation between the quartic coupling and the pole mass of the Higgs boson at the EW scale. We find that the numerical impact of the new corrections on the prediction for the Higgs mass is modest, but comparable to the accuracy of the Higgs-mass measurement at the LHC.