Scattering phase shift and resonance properties on the lattice: an introduction

Abstract

We describe the method for extracting the elastic scattering phase shift from a lattice simulation at an introductory level, for non-lattice practitioners. We consider the scattering in a resonant channel, where the resulting phase shift delta(s) allows the lattice determination of the mass and the width of the resonance from a Breit-Wigner type fit. We present the method for the example of P-wave pi-pi scattering in the rho meson channel.

10 pages, 6 figures, presented at Bled Mini-Workshop 2011, 3-10 July, Bled, Slovenia

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