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. �� 2014 CERN, for the ATLAS Collaboration.
Search for quantum black hole production in high-invariant-mass lepton + jet final states using pp collisions at ���s = 8 TeV and the ATLAS detector / Aad, G; Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; Chiefari, Giovanni; DELLA VOLPE, Domenico; Merola, Leonardo; Conventi, Francesco; DELLA PIETRA, Massimo; Giordano, Raffaele; Rossi, Elvira; SANCHEZ PINEDA, ARTURO RODOLFO; Carlino, Gianpaolo; de Asmundis, Riccardo; Di Donato, Camilla; Doria, Alessandra; Iengo, Paolo; Izzo, Vincenzo; Sekhniaidze, Givi; Et, Al. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 112:091804(2014), pp. 1-18. [10.1103/PhysRevLett.112.091804]
Search for quantum black hole production in high-invariant-mass lepton + jet final states using pp collisions at ���s = 8 TeV and the ATLAS detector
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;CONVENTI, FRANCESCO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2014
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. �� 2014 CERN, for the ATLAS Collaboration.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
