EPJ Web of Conferences 3, 02008 (2010)
https://doi.org/10.1051/epjconf/20100302008

Causality and universality in low-energy scattering

¹ Department of Physics, North Carolina State University, Raleigh, NC 27695, USA
² Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany

^a e-mail: dean_lee@ncsu.edu

Abstract

We discuss the generalization of Wigner’s causality bounds and Bethe’s integral formula for the effective range parameter to arbitrary dimension and arbitrary angular momentum. We consider the impact of these constraints on the separation of low- and high-momentum scales and universality in low-energy scattering.