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A search for an excess of events with multiple high transverse momentum objects including charged leptons and jets is presented, using 20.3 fb -1 of proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2012 at a centre-of-mass energy of √s = 8 TeV. No excess of events beyond Standard Model expectations is observed. Using extra-dimensional models for black hole and string ball production and decay, exclusion contours are determined as a function of the mass threshold for production and the fundamental gravity scale for two, four and six extra dimensions. For six extra dimensions, mass thresholds of 4.8-6.2 TeV are excluded at 95 % confidence level, depending on the fundamental gravity scale and model assumptions. Upper limits on the fiducial cross-sections for non-Standard Model production of these final states are set. [Figure not available: see fulltext.] © 2014 The Author(s).
Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., Aben, R., … Zwalinski, L. (2014). Search for microscopic black holes and string balls in final states with leptons and jets with the ATLAS detector at √s = 8 TeV. Journal of High Energy Physics, 2014(8). https://doi.org/10.1007/JHEP08(2014)103