Liquid scintillator detectors are playing an increasingly important role inlow-energy neutrino experiments. In this article, we describe a generic energyresponse model of liquid scintillator detectors that provides energyestimations of sub-percent accuracy. This model fits a minimal set ofphysically-motivated parameters that capture the essential characteristics ofscintillator response and that can naturally account for changes inscintillator over time, helping to avoid associated biases or systematicuncertainties. The model employs a one-step calculation and look-up tables,yielding an immediate estimation of energy and an efficient framework forquantifying systematic uncertainties and correlations.
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