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Feldman-Cousins' ML Cousin: Sterile Neutrino Global Fits using Simulation-Based Inference by Villarreal, Joshua; Hardin, John M.; Conrad, Janet M. is a scholarly article available to read on EtoBox.

What is Feldman-Cousins' ML Cousin: Sterile Neutrino Global Fits using Simulation-Based Inference about?

For many small-signal particle physics analyses, Wilks' theorem, a simplifying assumption that presumes log-likelihood asymptotic normality, does not hold. The most common alternative approach applied in particle physics is a highly computationally expensive procedure put forward by Feldman and Cousins. When many experiments are combined for a global fit to data, deviations from Wilks' theorem are exacerbated, and Feldman-Cousins becomes computationally intractable. We present a novel, machine learning-based procedure that can approximate a full-fledged Bayesian analysis 200 times faster than the Feldman-Cousins method. We demonstrate the utility of this novel method by performing a joint analysis of electron neutrino/antineutrino disappearance data within a single sterile neutrino oscillation framework. Although we present a prototypical simulation-based inference method for a sterile neutrino global fit, we anticipate that similar procedures will be useful for global fits of all kinds, especially those in which Feldman-Cousins is too computationally expensive to use.

Author

Villarreal, Joshua; Hardin, John M.; Conrad, Janet M.

Published

2025

Language

EN