Two-loop Calculations in the MSSM with FeynArts
نویسنده
چکیده
Recent electroweak two-loop corrections in the Minimal Supersymmetric Standard Model (MSSM) are reviewed. They have been obtained with the help of the programs FeynArts and TwoCalc, making use of the recently completed MSSM model file for FeynArts. Short examples of how to use the two codes together with the analytic result for the O (GFm 4 t ) corrections to the ρ-parameter in the MSSM are presented. ∗ Updated version of a talk given at the ACAT2000, Fermilab, Oct. 2000. † email: [email protected] Two-loop Calculations in the MSSM with FeynArts S. Heinemeyer HET, Brookhaven Natl. Lab., Upton, New York 11973, USA Abstract. Recent electroweak two-loop corrections in the Minimal Supersymmetric Standard Model (MSSM) are reviewed. They have been obtained with the help of the programs FeynArts and TwoCalc, making use of the recently completed MSSM model file for FeynArts. Short examples of how to use the two codes together with the analytic result for the O (GF m 4 t ) corrections to the ρ-parameter in the MSSM are presented.
منابع مشابه
The Implementation of the Minimal Supersymmetric Standard Model in FeynArts and FormCalc
We describe the implementation of the MSSM in the diagram generator FeynArts and the calculational tool FormCalc. This extension allows to perform loop calculations of MSSM processes almost fully automatically. The actual implementation has two aspects: The MSSM Feynman rules are specified in a new model file for FeynArts. The computation of the parameters in the MSSM Lagrangian from the input ...
متن کاملAutomatic Loop Calculations with FeynArts, FormCalc, and LoopTools
This article describes three Mathematica packages for the automatic calculation of one-loop Feynman diagrams: the diagrams are generated with FeynArts, algebraically simplified with FormCalc, and finally evaluated numerically using the LoopTools package. The calculations are performed analytically as far as possible, with results given in a form well suited for numerical evaluation. The latter ...
متن کاملTwo–loop Calculations in the Mssm
Recent results on two–loop calculations in the MSSM are reviewed. The computation of the QCD corrections to ∆ρ, ∆r and to the mass of the lightest Higgs boson in the MSSM are presented. Talk given at the workshop “Quantum Effects in the MSSM”, Sept. 1997, Barcelona, Spain TWO–LOOP CALCULATIONS IN THE MSSM S. HEINEMEYER Institut für theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Ge...
متن کاملTwo-Loop Higgs mass calculations in supersymmetric models beyond the MSSM with SARAH and SPheno
We present an extension to the Mathematica package SARAH which allows for Higgs mass calculations at the two-loop level in a wide range of supersymmetric (SUSY) models beyond the MSSM. These calculations are based on the effective potential approach and include all two-loop corrections which are independent of electroweak gauge couplings. For the numerical evaluation Fortran code for SPheno is ...
متن کاملar X iv : h ep - p h / 99 10 22 7 v 1 4 O ct 1 99 9 Loop Calculations
Three programs are presented for automatically generating and calculating Feynman diagrams: the diagrams are generated with FeynArts, algebraically simplified with FormCalc, and finally evaluated numerically using the LoopTools package. The calculations are performed analytically as far as possible, with results given in a form well suited for numerical evaluation. The latter is then straightfo...
متن کامل