Constraints on Supersymmetric SO(10) GUTs with Sum Rules among Soft   Masses
  We study phenomenological aspects of supersymmetric SO(10) GUTs with sum rules among soft SUSY breaking parameters. In particular, the sum rule related to the stau mass leads to the constraints from the requirements of successful electroweak breaking and the positivity of stau mass squared. The bottom quark mass is also estimated. 
Yoshiharu Kawamura, Tatsuo Kobayashi and Hitoshi Shimabukuro