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
2014 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 112, no 9, 091804- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2014. Vol. 112, no 9, 091804- p.
IdentifiersURN: urn:nbn:se:uu:diva-224141DOI: 10.1103/PhysRevLett.112.091804ISI: 000332687600001OAI: oai:DiVA.org:uu-224141DiVA: diva2:715562
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.112.0918042014-05-052014-05-052014-06-23Bibliographically approved