Neutrino masses and unification of the gauge and Yukawa couplings
  There is a convincing experimental evidence that neutrinos are massive. Therefore we investigate the influence of the neutrino masses on the unification of gauge and Yukawa couplings in the framework of the Minimal Supersymmetric Standard Model. We estimate the contribution of the neutrino Yukawa coupling to the gauge and Yukawa coupling unification. We find that in the case of the gauge coupling unification the effect of massive neutrinos is small and can be neglected. It appears to be much more significant, if we explore Y_{b} and Y_{tau} equality at the GUT scale. The neutrino contribution can change that relation even by ~12%. 
Kamila Kowalska (Institute of Theoretical Physics, Warsaw University,   Poland)