Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K

Understand

We report on the observation of Feshbach resonances in an ultracold mixture of two fermionic species, 6Li and 40K.

• The experimental data are interpreted using a simple asymptotic bound state model and full coupled channels calculations.
• This unambiguously assigns the observed resonances in terms of various s- and p-wave molecular states and fully characterizes the ground-state scattering properties in any combination of spin states.