Probabilistic Fragmentation and Effective Power Law
  A simple fragmentation model is introduced and analysed. We show that, under very general conditions, an effective power law for the mass distribution arises with realistic exponent. This exponent has a universal limit, but in practice the effective exponent depends on the detailed breaking mechanism and the initial conditions. This dependence is in good agreement with experimental results of fragmentation. 
M. Marsili and Y.-C. Zhang (Univ. Fribourg CH)