Quenched and Unquenched Chiral Perturbation Theory in the ε-Regime

Details Quenched and Unquenched Chiral Perturbation Theory in the ε-Regime Quenched and Unquenched Chiral Perturbation Theory in the ε-Regime

2003-10-13

arxiv.org/abs/hep-lat/0310037v1

Physics

High Energy Physics

High Energy Physics - Lattice

LaTeX, 7 pages, contribution to LHP2003

Scientific paper

10.1016/S0920-5632(03)02457-5

The chiral limit of finite-volume QCD is the $\epsilon$-regime of the theory. We discuss how this regime can be used for determining low-energy observables of QCD by means of comparisons between lattice simulations and quenched and unquenched chiral perturbation theory. The quenched theory suffers in the $\epsilon$-regime from ``quenched finite volume logs'', the finite-volume analogs of quenched chiral logs.

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