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Search for a heavy narrow resonance decaying to eμ, eτ, or μτ with the ATLAS detector in √s=7 TeV pp collisions at the LHC

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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<mark>Journal publication date</mark>10/06/2013
<mark>Journal</mark>Physics Letters B
Issue number1-3
Volume723
Number of pages18
Pages (from-to)15-32
Publication StatusPublished
<mark>Original language</mark>English

Abstract

This Letter presents the results of a search for a heavy particle decaying into an e±μ∓, e±τ∓, or μ±τ∓ final state in pp collisions at √s = 7 TeV. The data were recorded with the ATLAS detector at the LHC during 2011 and correspond to an integrated luminosity of 4.6 fb−1. No significant excess above the Standard Model expectation is observed, and exclusions at 95% confidence level are placed on the cross section times branching ratio for the production of an R-parity-violating supersymmetric tau sneutrino.
For a sneutrino mass of 500 (2000) GeV, the observed limits on the production cross section times branching ratio are 3.2 (1.4) fb, 42 (17) fb, and 40 (18) fb for the eμ, eτ, and μτ modes, respectively.
These results considerably extend constraints from Tevatron experiments.

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This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.