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Search for nonpointing photons in the diphoton and $E^{miss}_T$ final state in $\sqrt{s}$=7  TeV proton-proton collisions using the ATLAS detector

The ATLAS collaboration
Phys.Rev. D88 (2013) 012001, 2013

Abstract (data abstract)
CERN-LHC. Study of events with a final state comprising two photons and missing transverse energy in proton-proton interactions at a centre-of-mass energy of 7 TeV using a data sample, collected in 2011, with an integrated luminosity of 4.8 fb-1. The analysis is focussed on a search for photons originating in the decay of neutral long-lived particles, exploiting the electromagnetic calorimeters ability to make measurements of the flight direction of the photons as well as excellent time resolution. Results are compared with Standard Model (SM ) expections as well as the predictions from GMSB models.

  • Table 1

    Data from Fig 7


    The 95% CL observed number of signal events vs lifetime for a neutralino with Lambda of 120 TeV together with...

  • Table 2

    Data from Fig 7


    The 95% CL observed cross-section vs lifetime for a neutralino with Lambda of 120 TeV together with the SM expectation...

  • Table 3

    Data from Fig 8


    The observed exclusion limits on neutralino lifetime as a function of lambda together with the SM expectation.

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