Orbital-resolved three-body recombination across ap-wave Feshbach resonance in ultracold(6)Li.

We report precision, orbital-resolved measurements of three-body recombination near the 159 G-wave Feshbach resonance in an ultracold gas ofLi 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|mℓ|=1andmℓ=0orbital projections. The measured three-body loss coefficientis well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting δand effective-range parameterke. At the lowest temperature, we obtainδB=7.6(3) mG andke=0.151(6)a0-1, both in quantitative agreement with coupled-channel theory. These results establish orbital-resolved three-body spectroscopy as a precision probe of-wave scattering and provide a benchmark for microscopic models of resonant few-body loss.