title: Efimov trimer formation via ultracold four-body recombination.
abstract: We discuss the collisional formation of Efimov trimers via ultracold four-body recombination. In particular, we consider the reaction A+A+A+B-->A_{3}+B with A and B ultracold atoms. We obtain expressions for the four-body recombination rate up to an overall constant and show that it reflects the three-body Efimov physics either as a function of collision energy or as a function of the two-body s-wave scattering length between A atoms. In addition, we briefly discuss issues important for experimentally observing this interesting and unexplored process.
authors.affiliation: Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA.
authors.forename: Yujun
authors.initials: Y
authors.lastname: Wang
authors.forename: B D
authors.initials: BD
authors.lastname: Esry