title: Universal rate constants for reactive collisions of ultracold molecules.
abstract: A simple quantum-defect model gives analytic expressions for the complex scattering length and threshold collision rates of ultracold molecules. If the probability of reaction in the short-range part of the collision is high, the model gives universal rate constants for s- and p-wave collisions that are independent of short-range dynamics. This model explains the magnitudes of the recently measured rate constants for collisions of two ultracold 40K87Rb molecules, or an ultracold 40K atom with the 40K87Rb molecule [S. Ospelkaus et al., Science 327, 853 (2010).
authors.affiliation: Faculty of Physics, University of Warsaw, 00-681 Warsaw, Poland.
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Idziaszek
authors.forename: Paul S
authors.initials: PS
authors.lastname: Julienne