Name: ATLAS_2012_I1199269
 - Giovanni Marchiori <giovanni.marchiori@cern.ch>
References:
 - arXiv:1211.1913 [hep-ex]
 - JHEP 1301 (2013) 086
RunInfo:
  Inclusive diphoton+X events at $\sqrt{s} = 7$~TeV.
NumEvents: 1000000
Beams: [p+, p+] 
Energies: [7000] 
PtCuts: [25, 22]
Description:
'The ATLAS experiment at the LHC has measured the production cross
section of events with two isolated photons in the final state, in
proton-proton collisions at $\sqrt{s} = 7$ TeV. The full data set
collected in 2011, corresponding to an integrated luminosity of 4.9
fb$^{-1}$, is used. The amount of background, from hadronic jets and
isolated electrons, is estimated with data-driven techniques and
subtracted. The total cross section, for two isolated photons with
transverse energies above 25 GeV and 22 GeV respectively, in the
acceptance of the electromagnetic calorimeter ($|\eta|<1.37$ and
$1.52<|\eta|<2.37$) and with an angular separation $\Delta R>0.4$, is 
$44.0^{+3.2}_{-4.2}$ pb. The differential cross sections as a function of the
di-photon invariant mass, transverse momentum, azimuthal separation,
and cosine of the polar angle of the largest transverse energy photon
in the Collins--Soper di-photon rest frame are also measured. The
results are compared to the prediction of leading-order parton-shower
and next-to-leading-order and next-to-next-to-leading-order
parton-level generators.' 
BibTeX: 
@article{Aad:2012tba,
      author         = "Aad, Georges and others",
      title          = "{Measurement of isolated-photon pair production in $pp$
                        collisions at $\sqrt{s}=7$ TeV with the ATLAS detector}",
      collaboration  = "ATLAS Collaboration",
      journal        = "JHEP",
      volume         = "1301",
      pages          = "086",
      doi            = "10.1007/JHEP01(2013)086",
      year           = "2013",
      eprint         = "1211.1913",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ex",
      reportNumber   = "CERN-PH-EP-2012-300",
      SLACcitation   = "%%CITATION = ARXIV:1211.1913;%%",
}