the total rate $\beta_1$ for the parameters obtained in Ref. [@Lompe:2010] while the vertical line marks the boundary of the universal region. []{data-label="fig:beta2"}](beta2.pdf){width="15cm"}

In Fig. \[fig:beta2\], we show the experimental data from Ref. [@Lompe:2010] and our numerical results for $\beta_2$. The total rates, both of the data and the numerical results, show no pronounced structure. However, there is a local minimum in the partial rate $\beta^{\rm sh}_{2\to 1}$ near $600$ G that is outside the universal region. As discussed in Ref. [@DIncao:2009], this minimum is the effect of destructive interference between different recombination channels. This interference pattern does not exist in systems with identical bosons where relaxation can occur only into deep dimers. In the total rate, the interference is hidden by the dominant process $\beta^{\rm sh}_{2\to 3}$. The light solid curve again gives our universal result for the parameters $\Lambda=329~a_0^{-1}$ and $\eta_*=0.34$ obtained in Ref. [@Lompe:2010]. The difference between the two parameter sets is very small for $\beta_2$, but the alternative set gives a slightly better description of the data. Between 670 and 690 G, $a_2$ is much larger than $a_1$ and $a_3$ which are approximately equal. The scaling of the calculated rates into the shallow dimers is consistent 