General theoretical description of N-body recombination.
Formulas for the cross section and event rate constant describing recombination of N particles are derived in terms of general S-matrix elements. Our result immediately yields the generalized Wigner threshold scaling for the recombination of N bosons. A semianalytical formula encapsulates the overall scaling with energy and scattering length, as well as resonant modifications by the presence of N-body states near the threshold collision energy in the entrance channel. We then apply our model to the case of four-boson recombination into an Efimov trimer and a free atom.
Mehta
N P
NP
Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309, USA. mehtan@jilau1.colorado.edu
Rittenhouse
Seth T
ST
D'Incao
J P
JP
von Stecher
J
J
Greene
Chris H
CH