2025/12/02 by Shaokun Liu, Liu, Shaokun, Z. P. Xu +11
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Nuclear physics research studies #Atomic and Molecular Physics
paper · pdf · doi:10.48550/arxiv.2512.02479
We report precision, orbital-resolved measurements of three-body recombination near the 159~G p-wave Feshbach resonance in an ultracold gas of 6Li 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 L3 is well captured by a thermally averaged cascade-recombination model, enabling extraction of the resonance splitting δB and effective-range parameter ke. At the lowest temperature, we obtain δB = 7.6(3)~mG and ke = 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 p-wave scattering and provide a benchmark for microscopic models of resonant few-body loss.