We compute the two-loop QCD corrections to the neutral Higgs-boson masses in the Minimal Supersymmetric Standard Model, including the effect of non-vanishing external momenta in the self-energies. We obtain corrections of O(αtαs) and O(ααs), 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 DR¯ renormalization scheme or a mixed on-shell (OS)–DR¯ 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–DR¯ 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 Large Hadron Collider.
|Titolo:||Two-loop QCD corrections to the MSSM Higgs masses beyond the effective-potential approximation|
|Data di pubblicazione:||2015|
|Citazione:||Degrassi, G., Di Vita, S., & Slavich, P. (2015). Two-loop QCD corrections to the MSSM Higgs masses beyond the effective-potential approximation. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 75(2), 61.|
|Appare nelle tipologie:||1.1 Articolo in rivista|