Extracting physics from an unphysical situation: light mesons in a small box
W. Bietenholz, S. Capitani, T. Chiarappa, M. Hasenbusch, K. Jansen, M. Muller-Preussker, K. -I. Nagai, M. Papinutto, S. Shcheredin, A. Shindler, C. Urbach, I. Wetzorke
Abstract
Quantum Chromo Dynamics is considered in a setup where the light mesons are squeezed into unphysically small boxes. We show how such a situation can be used to determine the couplings of the low energy chiral Lagrangian from lattice simulations, applying chirally invariant formulations of lattice fermions.
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