Chirally enhanced corrections in the MSSM
  In the general MSSM, chirally-enhanced corrections (to Yukawa couplings) are induced by gluino-squark, chargino-sfermion and neutralino-sfermion loops and can numerically compete with, or even dominate over, tree-level contributions, due to their chiral enhancement. In this article I review the resummation of these corrections to all orders in pertubation theory based on recent work done in collaboration with Lars Hofer and Janusz Rosiek (arXiv:1103.4272). 
Andreas Crivellin
hep-ph