Freiburg 2008 – scientific programme
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T: Fachverband Teilchenphysik
T 10: Eingeladene Vorträge IV
T 10.3: Invited Talk (no funding)
Thursday, March 6, 2008, 15:00–15:30, KGII-HS 2006
αs at the GUT scale to 3-loop accuracy — •Luminita Mihaila — Universität Karlsruhe
Supersymmetry (SUSY) is currently believed to play an important role in physics beyond the Standard Model (SM). In contrast to the SM, the particle content of the Minimal Supersymmetric Standard Model (MSSM) leads in a natural way to the unification of the three gauge couplings at a high energy scale µ≃ 1016 GeV, in agreement with Grand Unification Theories (GUT).
In this talk, we report on the consistent evaluation to three-loop accuracy of the strong coupling αs in the MSSM at the GUT scale from its value at MZ. We find that the three-loop corrections are as large as, or even greater, than the effects induced by the current experimental accuracy of αs(MZ).