|Description||Daniel Bolton, Ph.D.|
Department of Physics, Baylor University
Using Lattice QCD to Constrain Chiral Perturbation Theory
Low energy observables in nuclear physics should be calculable directly from quantum chromodynamics (QCD), the fundamental theory of the strong nuclear force. However, the equations of motion are so nonlinear as to be unsolvable in
exact form. The technique of perturbation theory, which works so well for quantum electrodynamics, fails because the strong force is too strong. The only way to accurately compute low-energy observables directly from QCD is to use a
statistical simulation of the theory on a discretized and finite-sized version of
spacetime. This technique is called Lattice QCD and one of its frontiers is the computation of scattering observables. In the 1980s, a technique known as Lushers Method was developed to extract scattering parameters from the volume dependence of the energy levels of a multi-particle system in a finitesized box. I will discuss this method and work my colleagues and I have recently done on pion-pion scattering.
For more information, please contact: Dr. Kenichi Hatakeyama 254-710- 2286