Two-Loop Effective Potential Calculation of the Lightest CP-Even   Higgs-Boson Mass in the MSSM
  We calculate a two-loop effective potential to the order of {\cal O}(\lambda_t^2\alpha_s) in the MSSM. We then study the corresponding two-loop corrections to the CP-even Higgs-boson mass for arbitrary \tan\beta and left-right top-squark mixings. We find that the lightest Higgs-boson mass is changed by at most a few GeV. We also show the improved scale dependence and compare to previous two-loop analyses. 
Ren-Jie Zhang (UW-Madison)