Theta vacuum physics from QCD at fixed topology

Details Theta vacuum physics from QCD at fixed topology Theta vacuum physics from QCD at fixed topology

2007-10-24

arxiv.org/abs/0710.4469v1

PoSLAT2007:080,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 2 figures, talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4, 2007, Regen

Scientific paper

We propose a method to obtain physical quantities in the theta vacuum from those at fixed topology, which are different by finite size effects. Extending the work by Brower et al., we derive the formula to estimate these finite size corrections for arbitrary correlators in terms of the topological susceptibility and the theta dependence. Applying this formula, we show that topological susceptibility can be measured through two-point functions of pseudoscalar operator.

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