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

. 2014 Mar 07 ; 112 (9) : 091804. [epub] 20140305

Jazyk angličtina Země Spojené státy americké Médium print-electronic

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/pmid24655244

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 √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.

2 Physikalisches Institut Georg August Universität Göttingen Germany

2 Physikalisches Institut Justus Liebig Universität Giessen Giessen Germany

AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland

Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland

B 1 Stepanov Institute of Physics National Academy of Sciences of Belarus Minsk Republic of Belarus

Budker Institute of Nuclear Physics SB RAS Novosibirsk Russia

Cavendish Laboratory University of Cambridge Cambridge United Kingdom

Center for High Energy Physics University of Oregon Eugene Oregon USA

Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules Villeurbanne France

Centre National de l'Energie des Sciences Techniques Nucleaires Rabat Morocco

Centro de Investigaciones Universidad Antonio Narino Bogota Colombia

CERN Geneva Switzerland

CPPM Aix Marseille Université and CNRS IN2P3 Marseille France

Czech Technical University Prague Praha Czech Republic

D 5 Skobeltsyn Institute of Nuclear Physics M 5 Lomonosov Moscow State University Moscow Russia

Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile

Departamento de Fisica Teorica C 15 Universidad Autonoma de Madrid Madrid Spain

Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain

Departamento de Física Universidad de Buenos Aires Buenos Aires Argentina

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Department for Physics and Technology University of Bergen Bergen Norway

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Department of Physics Jožef Stefan Institute and University of Ljubljana Ljubljana Slovenia

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Graduate School of Science and Kobayashi Maskawa Institute Nagoya University Nagoya Japan

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High Energy Physics Division Argonne National Laboratory Argonne Illinois USA

High Energy Physics Institute Tbilisi State University Tbilisi Georgia

Homer L Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA

INFN Gruppo Collegato di Cosenza Laboratori Nazionali di Frascati Rende Italy and Dipartimento di Fisica Università della Calabria Rende Italy

INFN Gruppo Collegato di Udine Italy and Dipartimento di Chimica Fisica e Ambiente Università di Udine Udine Italy

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Laboratoire de Physique Nucléaire et de Hautes Energies UPMC and Université Paris Diderot and CNRS IN2P3 Paris France

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