Quenched and Unquenched Chiral Perturbation Theory in the ε-Regime

Abstract

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.

arXiv commentLaTeX, 7 pages, contribution to LHP2003

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Cited by in corpus (7)

• Nearly conformal gauge theories in finite volume
• Axial Correlation Functions in the epsilon-Regime: a Numerical Study with Overlap Fermions
• Low-energy couplings of QCD from topological zero-mode wave functions
• 2+1 Flavor QCD simulated in the epsilon-regime in different topological sectors
• The Replica Method and Toda Lattice Equations for QCD_3
• Finite Volume Gauge Theory Partition Functions in Three Dimensions
• On the phase diagram of quenched QCD with Wilson fermions