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

Abstract

This Letter presents the first search for a heavy particle decaying into an eμfinal 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. 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 single coupling dominance and the couplings lambda'_{311}=0.11, lambda_{312}=0.07. In a lepton flavor violating model, a Z'-like vector boson with masses of 0.70 to 1.00 TeV and corresponding cross sections times branching ratios of 0.175 to 0.183 pb is excluded. These results extend to higher mass RPV sneutrinos and LFV Z's than previous constraints from the Tevatron.

5 pages plus author list (18 pages total), 4 figures, 1 table, submitted to PRL

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• The ATLAS Simulation Infrastructure
• Single-top hadroproduction in association with a W boson
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• Luminosity Determination in pp Collisions at sqrt(s)=7 TeV Using the ATLAS Detector at the LHC
• Measurement of the W -> lnu and Z/gamma* -> ll production cross sections in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for R-parity Violating Decays of tau Sneutrinos to emu, mutau, and etau Pairs in ppbar Collisions at sqrt(s) = 1.96 TeV
• Search for sneutrino production in emu final states in 5.3 fb^-1 of ppbar collisions at sqrt(s) =1.96 TeV
• Search for sneutrino particles in e + mu final states in ppbar collisions at sqrt{s} =1.96 TeV
• QCD corrections to the R-parity violating processes $p\bar{p}/pp\to e\mu +X$ at hadron colliders

Cited by in corpus (12)

• Constrained Supersymmetry after two years of LHC data: a global view with Fittino
• Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
• Shedding Light on Dark Matter at Colliders
• Search for a heavy neutral particle decaying into an electron and a muon using 1 fb^-1 of ATLAS data
• A Case Study of the Sensitivity to LFV Operators with Precision Measurements and the LHC
• Overview of searches for dark matter at the LHC
• Search for lepton flavour violation in the emu continuum with the ATLAS detector in sqrt(s) = 7 TeV pp collisions at the LHC
• SUSY searches at ATLAS
• Multi-leptons and Top-jets in the Hunt for Gluinos in R-parity Violating Supersymmetry
• Four lepton flavor violating signals at the LHC
• RGE Effects on neutrino masses in partial split supersymmetry
• Single Production of Fourth Family Sneutrino via RPV Couplings at Linear Colliders