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arXiv · 1410.3432

Two-loop QCD corrections to the MSSM Higgs masses beyond the effective-potential approximation

G. Degrassi·S. Di Vita·P. Slavich
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Abstract

We compute the two-loop QCD corrections to the neutral Higgs-boson masses in the MSSM, including the effect of non-vanishing external momenta in the self-energies. We obtain corrections of O(alpha_t*alpha_s) and O(alpha*alpha_s), i.e., all two-loop corrections that involve the strong gauge coupling when the only non-vanishing Yukawa coupling is the top one. We adopt either the DRbar renormalization scheme or a mixed OS-DRbar scheme where the top/stop parameters are renormalized on-shell. We compare our results with those of earlier calculations, pointing out an inconsistency in a recent result obtained in the mixed OS-DRbar scheme. The numerical impact of the new corrections on the prediction for the lightest-scalar mass is moderate, but already comparable to the accuracy of the Higgs-mass measurement at the LHC.

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G. Degrassi, S. Di Vita, P. Slavich. 2015-02-09. Two-loop QCD corrections to the MSSM Higgs masses beyond the effective-potential approximation. https://doi.org/10.1140/epjc%2Fs10052-015-3280-5

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