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Search for a Heavy Particle Decaying into an Electron and a Muon with the ATLAS Detector in root s=7 TeV pp collisions at the LHC
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
University of Chicago.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 60882011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 106, no 25, p. 251801-Article in journal (Refereed) Published
Abstract [en]

This Letter presents the first search for a heavy particle decaying into an e(+/-)mu(-/+) final state in root s = 7 TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35 pb(-1). No excess above the standard model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming all R-parity violating couplings are zero except lambda(311)' = 0.11 and lambda(312) = 0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70-1.00 TeV and corresponding cross sections times branching ratios of 0.175-0.183 pb is excluded. These results extend to higher mass R-parity violating sneutrinos and lepton flavor violating Z's than previous constraints from the Tevatron.

Place, publisher, year, edition, pages
2011. Vol. 106, no 25, p. 251801-
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Physical Sciences
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URN: urn:nbn:se:kth:diva-36494DOI: 10.1103/PhysRevLett.106.251801ISI: 000291942400003Scopus ID: 2-s2.0-79960826567OAI: oai:DiVA.org:kth-36494DiVA, id: diva2:430797
Note
QC 20110711. Antal författare 6 088.Available from: 2011-07-12 Created: 2011-07-12 Last updated: 2019-12-04Bibliographically approved

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