Orbital-resolved three-body recombination across a p -wave Feshbach resonance in ultracold 6 Li

Abstract We report precision, orbital-resolved measurements of three-body recombination near the 159 G p -wave Feshbach resonance in an ultracold gas of 6 Li atoms prepared in their lowest hyperfine state. Using a radio-frequency gated protocol that suppresses magnetic-field transients below the milligauss level, we resolve loss features associated with the | m ℓ | = 1 and m ℓ = 0 orbital projections. The measured three-body loss coefficient L 3 is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting δ B and effective-range parameter k e . At the lowest temperature, we obtain δ B = 7.6 ( 3 ) mG and k e = 0.151 ( 6 ) a 0 − 1 , both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of p -wave scattering and provide a benchmark for microscopic models of resonant few-body loss.