Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gluon vs. Photon Production of a 750 GeV Diphoton Resonance   The production mechanism of a 750 GeV diphoton resonance, either via gluon or
photon fusion, can be probed by studying kinematic observables in the diphoton
events. We perform a detector study of the two production modes of a
hypothetical scalar or tensor diphoton resonance in order to characterize the
features of the two scenarios. The nature of the resonance production can be
determined from the jet multiplicity, the jet and diphoton rapidities, the rate
of central pseudorapidity gaps, or the possible detection of forward protons
from elastic photoproduction for events in the signal region. Kinematic
distributions for both signals and expected irreducible diphoton background
events are provided for comparison along with a study of observables useful for
distinguishing the two scenarios at an integrated luminosity of 20 fb$^{-1}$.
We find that decay photons from a 750 GeV scalar resonance have a preference
for acceptance in the central detector barrel, while background events are more
likely to give accepted photons in the detector end caps. This disfavors the
interpretation of the large number of excess events found by the the Run-2 CMS
diphoton search with one photon detected in the end cap as a wide spin-0
resonance signal. However, one expects more end cap photons in the case of
spin-2 resonance.

1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci