title: Three resonant ultracold bosons: off-resonance effects.
abstract: We solve a finite range two-channel model for three resonant identical bosons. The model provides a minimal description of the various magnetic Feshbach resonances in single species ultracold bosonic systems, including off-resonant scattering. We obtain important insights into the interpretation of seminal experiments: the three-body recombination rate measured in sodium and the Efimov resonances observed in cesium. This approach quantifies nonuniversal effects appearing for a finite magnetic field detuning.
authors.affiliation: LENS and Dipartimento di Fisica, Università di Firenze Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy.
authors.forename: Mattia
authors.initials: M
authors.lastname: Jona-Lasinio
authors.forename: Ludovic
authors.initials: L
authors.lastname: Pricoupenko