Surpassing Wigner's causality bound in relativistic scattering with zero-range interaction
arXiv:1402.4973
Abstract
It is shown that the relativistic zero-range potential scattering surpasses Wigner's causality bound, while being consistent with causality. The relativistic theory shows in addition a richer analytic structure, such as a -matrix pole necessarily accompanying the bound-state solution. Implications of these results for the effective-field theory of nuclear forces are briefly considered.
9 pages, 3 figures; Contribution to the 8th International Workshop on Chiral Dynamics, CD2015