Three-body recombination near the d -wave resonance in ultracold Rb85−Rb87 mixtures

In this study, we investigate the three-body recombination (TBR) rates on both sides of interspecies $d$-wave Feshbach resonance in $^{85}\mathrm{Rb}$ -$^{87}\mathrm{Rb}\ensuremath{-}^{87}\mathrm{Rb}$ system using $R$-matrix propagation method hyperspherical coordinate frame. Our calculations are based Lennard-Jones model potential for Rb-Rb interaction. Two different mechanisms recombination-rate enhancement positive and negative -$^{87}\mathrm{Rb} d$-wave scattering lengths analyzed. On positive-scattering-length side, occurs due to existence shape resonance, while negative-scattering-length coupling between lowest entrance channel highest is crucial appearance enhancement. addition, our study shows that intraspecies interaction has a significant role determining emergence enhancements. Compared case which three pairwise interactions when $^{87}\mathrm{Rb}\ensuremath{-}^{87}\mathrm{Rb}$ near values length produce shift. particular, away from disappears side with length.