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Search for new phenomena in events with a photon and missing transverse momentum in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

The collaboration
Phys.Rev. D91 (2015) 012008, 2015

Abstract (data abstract)
CERN-LHC. Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the LHC are reported. Data were collected in proton--proton collisions at a center-of-mass energy of 8 TeV and correspond to an integrated luminosity of 20.3 fb$^{-1}$. The observed data are well described by the expected Standard Model backgrounds. The expected (observed) upper limit on the fiducial cross section for the production of such events is 6.1 (5.3) fb at 95% confidence level. Exclusion limits are presented on models of new phenomena with large extra spatial dimensions, supersymmetric quarks, and direct pair production of dark-matter candidates.

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Data from Fig 6

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Distribution of ETmiss in the data and for the expected background in the single-muon control region. The total background expectation...

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Data from Fig 7

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Distribution of ETmiss in the data and for the expected background in the two-muon control region. The total background expectation...

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Data from Fig 8

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Distribution of ETmiss in the data and for the expected background in the two-electron control region. The total background expectation...

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Data from Fig 9

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Distribution of ETmiss in the signal region for data and for the background predicted from the fit in the CRs....

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Data from Fig 10

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Limits at 90% C.L. on the EFT suppression scale M* as a function of the WIMP mass m_chi, for the...

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Data from Fig 11

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Limits at 90% C.L. on the EFT suppression scale M* as a function of the WIMP mass m_chi, for the...

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Data from Fig 12

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Limits at 90% C.L. on the EFT suppression scale M* as a function of the WIMP mass m_chi, for the...

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Data from Fig 13

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Upper limits at 90% C.L. on the WIMP-nucleon scattering cross section as a function of m_chi for spin-independent and spin-dependent...

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Data from Fig 14

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Upper limits at 95% C.L. on the WIMP simplified model coupling parameter, sqrt(g_f g_chi), with vector coupling and mediator width...

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Data from Fig 15

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Observed lower limits at 95% C.L. on the EFT suppression scale M* as a function of the mediator mass mV,...

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Data from Fig 16

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Observed lower limits at 95% C.L. on the EFT suppression scale M* as a function of the mediator mass mV,...

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Data from Fig 17

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Limits at 95% C.L. on the effective mass scale M* in the (k2, k1) parameter plane for the s-channel EFT...

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Data from Fig 18

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Lower limits at 95% C.L. on the mass scale M_D in the ADD models of large extra dimensions, for several...

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Data from Fig 19

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Upper limits at 95% C.L. on the cross section for the compressed squark model, as a function of the squark...