An Algorithm for Obtaining Reliable Priors for Constrained-Curve Fits

Details An Algorithm for Obtaining Reliable Priors for Constrained-Curve Fits An Algorithm for Obtaining Reliable Priors for Constrained-Curve Fits

2003-09-11

arxiv.org/abs/hep-lat/0309045v1

Nucl.Phys.Proc.Suppl.129:844-846,2004

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2003(machine), 3 pages, 3 figures

Scientific paper

10.1016/S0920-5632(03)02730-0

We introduce the ``Sequential Empirical Bayes Method'', an adaptive constrained-curve fitting procedure for extracting reliable priors. These are then used in standard augmented-chi-square fits on separate data. This better stabilizes fits to lattice QCD overlap-fermion data at very low quark mass where a priori values are not otherwise known. We illustrate the efficacy of the method with data from overlap fermions, on a quenched $16^3\times 28$ lattice with spatial size La=3.2 fm and pion mass as low as $\sim$ 180 MeV.

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