QCD at fixed topology
Abstract
Since present Monte Carlo algorithms for lattice QCD may become trapped in a fixed topological charge sector, it is important to understand the effect of calculating at fixed topology. In this Letter, we show that although the restriction to a fixed topological sector becomes irrelevant in the infinite volume limit, it gives rise to characteristic finitesize effects due to contributions from all θvacua. We calculate these effects and show how to extract physical results from numerical data obtained at fixed topology.
 Publication:

Physics Letters B
 Pub Date:
 May 2003
 DOI:
 10.1016/S03702693(03)003691
 arXiv:
 arXiv:heplat/0302005
 Bibcode:
 2003PhLB..560...64B
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 14 Pages, no fgures