QCD at Fixed Topology

Details QCD at Fixed Topology QCD at Fixed Topology

2003-02-10

arxiv.org/abs/hep-lat/0302005v1

Phys.Lett.B560:64-74,2003

Physics

High Energy Physics

High Energy Physics - Lattice

14 Pages, no fgures

Scientific paper

10.1016/S0370-2693(03)00369-1

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 work, we show that although the restriction to a fixed topological sector becomes irrelevant in the infinite volume limit, it gives rise to characteristic finite size effects due to contributions from all $\theta$-vacua. We calculate these effects and show how to extract physical results from numerical data obtained at fixed topology.

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