Search for quantum black hole production in high-invariant-mass lepton plus jet final states using pp collisions at root s=8 TeV and the ATLAS detector
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CitationADD, G., ABAJYAN, T., ABBOTT, B., ABDALLAH, J., KHALEK, S.A., ABDINOV, O., ATLAS Collaboration. (2014). Search for quantum black hole production in high-invariant-mass lepton plus jet final states using pp collisions at root s=8 TeV and the ATLAS detector. Physical Review Letters, 112 (9), 18p. http://dx.doi.org/10.1103/PhysRevLett.112.091804.
This Letter presents a search for quantum black-hole production using 20.3 fb(-1) of data collected with the ATLAS detector in pp collisions at the LHC at root s = 8 TeV. The quantum black holes are assumed to decay into a final state characterized by 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.