Theta vacuum physics from QCD at fixed topology
High Energy Physics - Lattice
2009-04-14 v1
Abstract
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.
Cite
@article{arxiv.0710.4469,
title = {Theta vacuum physics from QCD at fixed topology},
author = {Sinya Aoki and Hidenori Fukaya and Shoji Hashimoto and Tetsuya Onogi},
journal= {arXiv preprint arXiv:0710.4469},
year = {2009}
}
Comments
7 pages, 2 figures, talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4, 2007, Regensburg, Germany