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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.
University of Chicago.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 6088
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 106, no 25, 251801- p.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, 251801- p.
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Physical Sciences
URN: urn:nbn:se:kth:diva-36494DOI: 10.1103/PhysRevLett.106.251801ISI: 000291942400003ScopusID: 2-s2.0-79960826567OAI: diva2:430797
QC 20110711. Antal författare 6 088.Available from: 2011-07-12 Created: 2011-07-12 Last updated: 2012-02-01Bibliographically approved

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Grahn, Karl-JohanLund-Jensen, BengtStrandberg, Jonas
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