Reference priors for high energy physics

Details Reference priors for high energy physics Reference priors for high energy physics

2010-02-05

arxiv.org/abs/1002.1111v2

Phys.Rev.D82:034002,2010

Statistics

Applications

Scientific paper

10.1103/PhysRevD.82.034002

Bayesian inferences in high energy physics often use uniform prior distributions for parameters about which little or no information is available before data are collected. The resulting posterior distributions are therefore sensitive to the choice of parametrization for the problem and may even be improper if this choice is not carefully considered. Here we describe an extensively tested methodology, known as reference analysis, which allows one to construct parametrization-invariant priors that embody the notion of minimal informativeness in a mathematically well-defined sense. We apply this methodology to general cross section measurements and show that it yields sensible results. A recent measurement of the single top quark cross section illustrates the relevant techniques in a realistic situation.

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