Evidence for light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC

The ATLAS collaboration
Nature Phys. 13 (2017) 852-858, 2017.

Abstract (data abstract)
CERN-LHC. Measurement of the total fiducial cross section for light-by-light scattering in lead-lead collisions at a centre-of-mass energy of 5.02 TeV with 0.48 nb^-1 of data collected in 2015. The final states used are 2 photons and no further activity in the detector. The fiducial region is defined as: - 2Gamma - pt_Gamma > 3 GeV - |eta_Gamma| < 2.4 - m_GammaGamma must be above 6 GeV - pt_GammaGamma must be below 2 GeV - aco_GammaGamma must be below 0.01

  • Table 1

    Data from Figure 3A


    Detector-level diphoton acoplanarity distribution

  • Table 2

    Data from Figure 3B


    Detector-level diphoton invariant mass distribution

  • Table 3

    Data from Page 10 of preprint


    The measured total fiducial cross section

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