Tree-body loss of of trapped ultracold $^{87}$Rb atoms due to a Feshbach   resonance
  The loss of ultracold trapped atoms in the vicinity of a Feshbach resonance is treated as a two-stage reaction, using the Breit-Wigner theory. The first stage is the formation of a resonant diatomic molecule, and the second one is its deactivation by inelastic collisions with other atoms. This model is applied to the analysis of recent experiments on $^{87}$Rb, leading to an estimated value of $7\times 10^{-11}$ cm$^{3}/$s for the deactivation rate coefficient. 
V. A. Yurovsky and A. Ben-Reuven (School of Chemistry, Tel Aviv   University)