larger than the naive error estimate of 10%. Taking into account the unknown prefactor of order one in the estimate, however, the two values are consistent. Except near the resonance, the experimental data are generally above our results.

Lompe [*et al.*]{} [@Lompe:2010] analyzed their data near the resonance at $B_*$ using an approximate analytic expression from [@Braaten:2009ey] and extracted the resonance position and the width parameter $\eta_*$. They found the value $\eta_*=0.34$ which is more than an order of magnitude larger than the value 0.016 extracted from three-body recombination. Moreover, the normalization of the relaxation rate was adjusted to describe the data. The light solid curve in Fig. \[fig:beta1\] gives our universal result for the parameters $\Lambda=329~a_0^{-1}$ (which reproduces the resonance position $B_{*}^{\rm exp}=685$ G) and $\eta_*=0.34$. These parameters give a much better description of the data in Refs. [@Lompe:2010; @Nakajima:2010] but are generally a factor 2-3 above the experimental data. However, one should keep in mind that the experimental data are only a factor three lower than the unitarity bound and finite temperature effects are likely important. We will come back to this issue in the next section.

The reason for the considerably larger value of $\eta_*$ extracted in 