Search for a heavy particle decaying into an electron and a muon with the ATLAS detector in sqrt[s] = 7 TeV pp collisions at the LHC

Aad, G; Abbott, B; Abdallah, J; Abdelalim, A A; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, B S; Adams, D L; Addy, T N; Adelman, J; Aderholz, M; Adomeit, S; Adragna, P; Adye, T; Aefsky, S; ... (2011). Search for a heavy particle decaying into an electron and a muon with the ATLAS detector in sqrt[s] = 7 TeV pp collisions at the LHC. Physical review letters, 106(25), p. 251801. Ridge, N.Y.: American Physical Society 10.1103/PhysRevLett.106.251801

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This Letter presents the first search for a heavy particle decaying into an e ± μ(-/+) final state in sqrt[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 λ(311)' = 0.11 and λ312 = 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.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
UniBE Contributor:	Battaglia, Andreas, Beck, Hans Peter, Borer, Claudia
ISSN:	0031-9007
Publisher:	American Physical Society
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:25
Last Modified:	05 Dec 2022 14:07
Publisher DOI:	10.1103/PhysRevLett.106.251801
PubMed ID:	21770629
Web of Science ID:	000291942400003
URI:	https://boris.unibe.ch/id/eprint/8824 (FactScience: 214458)