Statistical methods used in ATLAS for exclusion and discovery

Details Statistical methods used in ATLAS for exclusion and discovery Statistical methods used in ATLAS for exclusion and discovery

2011-08-10

arxiv.org/abs/1108.2288v1

Physics

Data Analysis, Statistics and Probability

PHYSTAT 2011

Scientific paper

The statistical methods used by the ATLAS Collaboration for setting upper limits or establishing a discovery are reviewed, as they are fundamental ingredients in the search for new phenomena. The analyses published so far adopted different approaches, choosing a frequentist or a Bayesian or a hybrid frequentist-Bayesian method to perform a search for new physics and set upper limits. In this note, after the introduction of the necessary basic concepts of statistical hypothesis testing, a few recommendations are made about the preferred approaches to be followed in future analyses.

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