10–17 Jul 2019
Ghent
Europe/Brussels timezone

Bayesian and frequentist approaches to discoveries

15 Jul 2019, 18:30
1h 30m
ICC - Arteveldeforum (Ghent)

ICC - Arteveldeforum

Ghent

Poster Searches for New Physics Wine & Cheese Poster Session

Speaker

Dr Andrew Fowlie (Nanjing Normal University)

Description

I discuss findings from my recent comparison of Bayesian and frequentist approaches to resonance searches (1902.03243). I introduce a counting experiment based on a search for the Higgs boson from which I generate pseudo-data. With that pseudo-data, I contrast the evolution of the $p$-value and posterior as we accumulate data and directly compare global $p$-values and the posterior of the background model. I find that in this toy problem $p$-values are typically smaller than the posterior by one or two orders of magnitude. I discuss the implications of this result for our interpretation of anomalies in resonance searches and searches for new physics in general.

Author

Dr Andrew Fowlie (Nanjing Normal University)

Presentation materials

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