Göttingen 2012 – scientific programme
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T: Fachverband Teilchenphysik
T 17: Beyond the Standard Model (Theorie) 3
T 17.4: Talk
Wednesday, February 29, 2012, 17:30–17:45, VG 3.102
Electroweak Corrections to Decoupling Coefficients in the Minimal Supersymmetric Standard Model — •David Kunz, Luminita Mihaila, Jens Salomon, and Matthias Steinhauser — Institut für Theoretische Teilchenphysik, KIT
By integrating out all the heavy particles one can derive an effective theory, which has the same low-energy predictions as the full theory, but contains only light particles. In order to calculate the effective Lagrangian density, one has to rescale fields and parameters by multiplicative factors, the so-called decoupling coefficients.
In this talk, results for the decoupling coefficient of the top quark mass up to order αs α and αs2 are presented, where the Minimal Supersymmetric Standard Model is considered as full and Quantum Chromo Dynamics as effective theory. We discuss both the two-loop calculation and the on-shell renormalization of the parameters and fields.
The new corrections allow the study of electroweak effects on the decoupling procedure and the implifications to the top quark mass at the scale of Grand Unified Theories.