Fast Fits for Lattice QCD Correlators
  We illustrate a technique for fitting lattice QCD correlators to sums of exponentials that is significantly faster than traditional fitting methods --- 10--40 times faster for the realistic examples we present. Our examples are drawn from a recent analysis of the Upsilon spectrum, and another recent analysis of the D -> pi semileptonic form factor. For single correlators, we show how to simplify traditional effective-mass analyses. 
K. Hornbostel, G. P. Lepage, C. T. H. Davies, R. J. Dowdall, H. Na, J.   Shigemitsu
hep-lat