title: Nuclear-spin-independent short-range three-body physics in ultracold atoms.
abstract: We investigate three-body recombination loss across a Feshbach resonance in a gas of ultracold 7Li atoms prepared in the absolute ground state and perform a comparison with previously reported results of a different nuclear-spin state [N. Gross, Phys. Rev. Lett. 103, 163202 (2009)]. We extend the previously reported universality in three-body recombination loss across a Feshbach resonance to the absolute ground state. We show that the positions and widths of recombination minima and Efimov resonances are identical for both states which indicates that the short-range physics is nuclear-spin independent.
authors.affiliation: Department of Physics, Bar-Ilan University, Ramat-Gan, 52900 Israel.
authors.forename: Noam
authors.initials: N
authors.lastname: Gross
authors.forename: Zav
authors.initials: Z
authors.lastname: Shotan
authors.forename: Servaas
authors.initials: S
authors.lastname: Kokkelmans
authors.forename: Lev
authors.initials: L
authors.lastname: Khaykovich