This Letter presents a search for quantumblack-hole production using 20:3 fb -1 of data collected with the ATLAS detector in pp collisions at the LHC at √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 TeVor 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 TeVis 0.18 fb. This limit constrains the threshold quantum black-hole mass to be above 5.3 TeV in the model considered.
Search for Quantum Black Hole Production in High-Invariant-Mass Lepton plus Jet Final States Using pp Collisions at √s=8 TeV and the ATLAS Detector
CAVASINNI, VINCENZO;A. Cervelli;DONATI, SIMONE;S. Dube;P. Francavilla;D. Froidevaux;RODA, CHIARA MARIA ANGELA;V. Rossetti;Verducci, M.;S. Vlachos;
2014-01-01
Abstract
This Letter presents a search for quantumblack-hole production using 20:3 fb -1 of data collected with the ATLAS detector in pp collisions at the LHC at √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 TeVor 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 TeVis 0.18 fb. This limit constrains the threshold quantum black-hole mass to be above 5.3 TeV in the model considered.File | Dimensione | Formato | |
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PhysRevLett.112.091804.pdf
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