title: Two-loop QCD corrections to the MSSM Higgs masses beyond the effective-potential approximation.
abstract: 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 [Formula: see text] and [Formula: see text], 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 [Formula: see text] renormalization scheme or a mixed on-shell (OS)-[Formula: see text] 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-[Formula: see text] 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.
authors.affiliation: Dipartimento di Matematica e Fisica, Università di Roma Tre and INFN, Sezione di Roma Tre, Via della Vasca Navale 84, 00146 Rome, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Degrassi
authors.affiliation: Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 Munich, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Di Vita
authors.affiliation: LPTHE, UPMC Univ. Paris 06, Sorbonne Universités, 4 Place Jussieu, 75252 Paris, France ; LPTHE, CNRS, 4 Place Jussieu, 75252 Paris, France.
authors.forename: P
authors.initials: P
authors.lastname: Slavich
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