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Search for Quantum Black Hole Production in High-Invariant-Mass Lepton$+$Jet Final States Using $pp$ Collisions at $\sqrt{s} =$ 8  TeV and the ATLAS Detector

The ATLAS collaboration
Phys.Rev.Lett. 112 (2014) 091804, 2014

Abstract (data abstract)
CERN-LHC. Search for quantum black-hole production using 20.3 inverse fb of data collected in 2012 with the ATLAS detector in pp collisions at the LHC at sqrt(s) = 8 TeV. The quantum black holes are assumed to decay into a lepton (electron or muon) and a jet. In either channel, no event with a lepton-jet invariant mass of 3.5 TeV or more is observed, consistent with the expected background. Limits are set on the product of cross sections and branching fractions for the lepton+jet final states of quantum black holes produced in a search region for invariant masses above 1 TeV. The combined 95% confidence level upper limit on this product for quantum black holes with threshold mass above 3.5 TeV is 0.18 fb. This limit constrains the threshold quantum black-hole mass to be above 5.3 TeV in the model considered.

  • Table 1

    Data from Figure 2

    10.17182/hepdata.62447.v1/t1

    The combined 95% CL upper limits on the cross section times branching fraction (SIG*BR) for Quantum Black Holes decaying to...

  • Table 2

    Data from Auxiliary Figure 23

    10.17182/hepdata.62447.v1/t2

    Numbers of observed events and expected background events for electron+jet channel, along with acceptance (A), experimental efficiency (EPSILON), cumulative efficiency...

  • Table 3

    Data from Auxiliary Figure 24

    10.17182/hepdata.62447.v1/t3

    Numbers of observed events and expected background events for muon+jet channel, along with acceptance (A), experimental efficiency (EPSILON), cumulative efficiency...

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