Title: The Efimov effect for heteronuclear three-body systems at positive scattering length and finite temperature,
Abstract: We study the recombination process of three atoms scattering into an atom and
diatomic molecule in heteronuclear mixtures of ultracold atomic gases with
large and positive interspecies scattering length at finite temperature. We
calculate the temperature dependence of the three-body recombination rates by
extracting universal scaling functions that parametrize the energy dependence
of the scattering matrix. We compare our results to experimental data for the
40K-87Rb mixture and make a prediction for 6Li-87Rb. We find that contributions
from higher partial wave channels significantly impact the total rate and, in
systems with particularly large mass imbalance, can even obliterate the
recombination minima associated with the Efimov effect.