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Features in the Standard Model diphoton background

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arxiv 1606.09592 v2 pith:4KDTGCLV submitted 2016-06-30 hep-ph hep-ex

classification hep-phhep-ex
keywords diphotonelectromagneticfeaturesadditionalanalysisarguebackgroundbump-like
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We argue that electromagnetic decays of energetic unflavoured neutral mesons, notably $\eta$, mis-identified as single photons due to granularity of the electromagnetic calorimeter might create bump-like features in the diphoton invariant mass spectrum at different energies, including 750 GeV. We discuss what kind of additional analysis can exclude or confirm this hypothesis.

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