Extrapolation of lattice QCD results beyond the power-counting regime
arXiv:hep-lat/0501028 · doi:10.1016/j.nuclphysa.2005.03.024
Abstract
Resummation of the chiral expansion is necessary to make accurate contact with current lattice simulation results of full QCD. Resummation techniques including relativistic formulations of chiral effective field theory and finite-range regularization (FRR) techniques are reviewed, with an emphasis on using lattice simulation results to constrain the parameters of the chiral expansion. We illustrate how the chiral extrapolation problem has been solved and use FRR techniques to identify the power-counting regime (PCR) of chiral perturbation theory. To fourth-order in the expansion at the 1% tolerance level, we find 0 \le m_pi \le 0.18 GeV for the PCR, extending only a small distance beyond the physical pion mass.
12 pages, 5 figures, plenary talk at BARYONS 2004, Paris, Oct. 25-29
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- Chiral extrapolations for nucleon magnetic moments
- The Spin of the Proton
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- Power Counting Regime of Chiral Effective Field Theory and Beyond
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- Exploring the Chiral Regime of QCD in the Interacting Instanton Liquid Model
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- Limitations of the heavy-baryon expansion as revealed by a pion-mass dispersion relation
- Baryon resonances and hadronic interactions in a finite volume
- Baryons on the lattice
- Towards selecting a finite-range regularization scale
- Ph.D. Thesis: Chiral Effective Field Theory Beyond the Power-Counting Regime