Breit-Wigner width for two interacting particles in one-dimensional   random potential
  For two interacting particles (TIP) in one-dimensional random potential the dependence of the Breit-Wigner width $\Gamma$, the local density of states and the TIP localization length on system parameters is determined analytically. The theoretical predictions for $\Gamma$ are confirmed by numerical simulations. 
Ph. Jacquod, D.L. Shepelyansky and O.P. Sushkov