We observe new Feshbach resonances in ultracold mixtures of $^{ 85}$Rb and $^{ 87}$Rb atoms in the $^{ 85}$Rb$|2, +2\rangle$+$^{ 87}$Rb$|1, +1\rangle$ and $^{ 85}$Rb$|2, -2\rangle$+$^{ 87}$Rb$|1, -1\rangle$ scattering channels. The positions and properties of the resonances are predicted and characterized using the semi-analytic multichannel quantum-defect theory by Gao. Of particular interest, a number of broad entrance-channel dominated p-wave resonances are identified, implicating exciting opportunities for studying a variety of p-wave interaction dominated physics.
Categories: cond-mat.quant-gas physics.atom-ph
