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arXiv · 1607.06608

Bayes-factor of the ATLAS diphoton excess

Andrew Fowlie
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Abstract

We present a calculation of Bayes-factors for the digamma resonance ($\digamma$) versus the SM in light of ATLAS 8 TeV 20.3/fb, 13 TeV 3.2/fb and 13 TeV 15.4/fb data, sidestepping any difficulties in interpreting significances in frequentist statistics. We matched, wherever possible, parameterisations in the ATLAS analysis. We calculated that the plausibility of the $\digamma$ versus the Standard Model increased by about eight in light of the 8 TeV 20.3/fb and 13 TeV 3.2/fb ATLAS data, somewhat justifying interest in $\digamma$ models. All told, however, in light of 15.4/fb data, the $\digamma$ was disfavoured by about 0.7.

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Andrew Fowlie. 2016-07-22. Bayes-factor of the ATLAS diphoton excess. https://doi.org/10.1140/epjp/i2017-11340-1

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