Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Features in the Standard Model diphoton background   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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The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom