Abstract
Formulas for the cross section and event rate constant describing recombination of particles are derived in terms of general -matrix elements. Our result immediately yields the generalized Wigner threshold scaling for the recombination of bosons. A semianalytical formula encapsulates the overall scaling with energy and scattering length, as well as resonant modifications by the presence of -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.
- Received 24 April 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.153201
©2009 American Physical Society