Asymptotic formulae for likelihood-based tests of new physics. / Cowan, Glen; Cranmer, Kyle; Gross, Eilam; Vitells, Ofer.

In: European Physical Journal C: Particles and Fields, Vol. 71, No. 2, 1554, 09.02.2011.

Research output: Contribution to journalArticlepeer-review



We describe likelihood-based statistical tests for use in high energy physics for the discovery of new phenomena and for construction of confidence intervals on model parameters. We focus on the properties of the test procedures that allow one to account for systematic uncertainties. Explicit formulae for the asymptotic distributions of test statistics are derived using results of Wilks and Wald. We motivate and justify the use of a representative data set, called the "Asimov data set", which provides a simple method to obtain the median experimental sensitivity of a search or measurement as well as fluctuations about this expectation.
Original languageEnglish
Article number1554
Number of pages19
JournalEuropean Physical Journal C: Particles and Fields
Issue number2
Publication statusPublished - 9 Feb 2011
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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