Speaker
Arthur Dromard
(Goethe University)
Description
At small lattice spacing, or when using e.g. overlap fermions,
lattice QCD simulations tend to become stuck in a single topological
sector. Physical observables, e.g. hadron masses, then differ from
their full QCD counterparts by 1/V corrections, where V is the
space-time volume. These corrections can be calculated order by order
using the saddle point method. We calculate all corrections
proportional to 1/V^2 and 1/V^3 and test the resulting equations for
several models: an analytically solvable quantum mechanical model, the
Schwinger model, and pure SU(2) Yang Mills theory
Author
Arthur Dromard
(Goethe University)
Co-author
Marc Wagner
(Goethe University Frankfurt)
