Three-body recombination near a narrow Feshbach resonance in $^6$Li

$^6$Li narrow Feshbach resonance near a magnetic field of 543.3 Gauss allows studies of strongly interacting fermions with a large effective range [1]. Above the resonance threshold, three-body recombination rate $L_{3}$ is dramatically enhanced by the formation of metastable dimers [2], which subsequently decay via atom-dimer relaxation that can be described by a rate constant $K_{ad}$. By preparing atoms at various temperatures and sweep the magnetic field close to the resonance, we map out the dependence of $L_{3}$ on both the magnetic field and the temperature. From such $L_3$ we extract, what we believe, a first experimental measurement of the temperature dependence of $K_{ad}(T)$. We find that $K_{ad}$ decreases with temperature in the ultracold regime, as predicted in [3], but with absolute values that differ from those of the universal quantum Langevin model [3], at least at this initial stage of analysis. [1] Tin-Lun Ho, Xiaoling Cui and Weiran Li, Phys. Rev. Lett., \textbf{108}, 250401, (2012) [2] E. L. Hazlett, Y. Zhang, R.W. Stites and K. M. O'Hara, Phys. Rev. Lett., \textbf{108}, 045304, (2012) [3] Bo Gao, Phys. Rev. Lett., \textbf{105}, 263203, (2010)