Testing perturbative results with non-perturbative methods for the Hierarchical model
classification
✦ hep-lat
keywords
resultscalculatehierarchicalmethodsmodelnon-perturbativeperturbativeaccurate
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We present non-perturbative methods to calculate accurately the renormalized quantities for Dyson's Hierarchical Model. We apply this method and calculate the critical exponent gamma with 12 and 4 significant digits in the high and low temperature phases, respectively. We report accurate values for universal ratios of amplitudes and preliminary results concerning the comparison with perturbative results.
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