Search for the lepton flavor violating decay $Z\to e\mu$ in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector

Abstract

The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process $Z\to e\mu$ in pp collisions using 20.3 $f{b}^{-1}$ of data collected at $\sqrt{s}$ = 8 TeV. An enhancement in the $e\mu$ invariant mass spectrum is searched for at the Z boson mass. The number of Z bosons produced in the data sample is estimated using events of similar topology, $Z\to ee$ and $\mu \mu$, significantly reducing the systematic uncertainty in the measurement. There is no evidence of an enhancement at the Z boson mass, resulting in an upper limit on the branching fraction, $B(Z\to e\mu )$ < 7.5 x 10${}^{-7}$ at the 95% confidence level.

arXiv comment6 pages plus author list + cover pages (19 pages total), 3 figures, 1 table, submitted to Phys. Rev. D, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2013-02/

References in corpus (24)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Matching NLO QCD computations and parton shower simulations
• The ATLAS Simulation Infrastructure
• The CT10 NNLO Global Analysis of QCD
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
• Performance of the ATLAS Trigger System in 2010
• Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS
• W+W-, WZ and ZZ production in the POWHEG BOX
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• The Monte Carlo Event Generator AcerMC 2.0 with Interfaces to PYTHIA 6.2 and HERWIG 6.5
• The mu - e Conversion in Nuclei, mu --> e gamma, mu --> 3e Decays and TeV Scale See-Saw Scenarios of Neutrino Mass Generation
• Gluon-induced W-boson pair production 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
• Composite Leptoquarks at the LHC
• Muon reconstruction efficiency and momentum resolution of the ATLAS experiment in proton-proton collisions at $\sqrt{s}$=7 TeV in 2010
• Majoron emission in muon and tau decays revisited
• Lepton flavor violating $\mu \to e\gamma$ and $\mu -e$ conversion in unparticle physics
• LHC sensitivity to lepton flavour violating Z boson decays

Cited by in corpus (48)

• Global constraints on heavy neutrino mixing
• Search for lepton-flavour-violating decays of the Higgs and $Z$ bosons with the ATLAS detector
• Model independent constraints on four-lepton operators
• Cabibbo anomaly versus electroweak precision tests: An exploration of extensions of the Standard Model
• Combined explanations of $(g-2{)}_{\mu }$, $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ anomalies in a two-loop radiative neutrino mass model
• Lepton flavor violating decays of vector quarkonia and of the $Z$ boson
• Lepton flavor violating Z decays: A promising window to low scale seesaw neutrinos
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Lepton flavor violating decays of Standard-Model-like Higgs in 3-3-1 model with neutral lepton
• Effective approach to lepton observables: the seesaw case
• Interpretation of Lepton Flavor Violation
• Towards deconstructing the simplest seesaw mechanism
• Limits on Neutrinophilic Two-Higgs-Doublet Models from Flavor Physics
• Lepton Flavour Violating top decays at the LHC
• Mu to e gamma and matching at mW
• Majorana Neutrino Masses in the RGEs for Lepton Flavour Violation
• Introduction to Charged Lepton Flavour Violation
• Reach and complementarity of $\mu \to e$ searches
• Search for the charged lepton flavor violating decay $J/\psi \to e\tau$
• Sensitivity of future lepton colliders to the search for charged lepton flavor violation
• Contributions to $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$) couplings from $CP$ violating flavor changing couplings
• Charged Lepton Flavor Violating Processes and Scalar Leptoquark Decay Branching Ratios in the Colored Zee-Babu Model
• A Case Study of the Sensitivity to LFV Operators with Precision Measurements and the LHC
• Magnetic Moments of Leptons, Charged Lepton Flavor Violations and Dark Matter Phenomenology of a Minimal Radiative Dirac Neutrino Mass Model
• Effective comparison of neutrino-mass models
• Search for the charged-lepton-flavor-violating decay $Z\to e\mu$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for lepton-flavor-violating decays of the $Z$ boson into a $\tau$ lepton and a light lepton with the ATLAS detector
• Leptonic scalar portal: Origin of muon $g-2$ anomaly and dark matter?
• Flavor Physics at the CEPC: a General Perspective
• Exploring vector-like supersymmetric extensions of the Standard Model with dark matter and colliders
• Sensitivity of future lepton colliders and low-energy experiments to charged lepton flavor violation from bileptons
• Renormalization group improved implications of semileptonic operators in SMEFT
• Search for the lepton flavor violating decay $J/\psi \to e\mu$
• Lepton-flavour violating decays in theories with dimension 6 operators
• The LFV decays of Z boson in Minimal R-symmetric Supersymmetric Standard Model
• Two-body lepton-flavour-violating decays in a 2HDM with soft family-lepton-number breaking
• Exploring Optimal Sensitivity of Lepton Flavor Violating Effective Couplings at the $e^{+}{e}^{-}$ Colliders
• SMEFT analysis of charged lepton flavor violating $B$-meson decays
• $Z$ boson decays $Z\to {l_i}^{\pm }{l_j}^{\mp }$ and Higgs boson decays $h\to {l_i}^{\pm }{l_j}^{\mp }$ with lepton flavor violation in a $U(1)$ extension of the MSSM
• Alternative Perspective on Gauged Lepton Number and Implications for Collider Physics
• $Z\to l_i^{\pm }{l}_j^{\mp }$ processes in the BLMSSM
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Z lepton flavour violation as a probe for new physics at future $e^{+}{e}^{-}$ colliders
• Search for R-Parity-Violation-Induced Charged Lepton Flavor Violation at Future Lepton Colliders
• Decays $Z\to e_a{e}_b$ in a 3-3-1 model with neutral leptons
• Lepton flavor violating top quark FCNC processes at the $\mu$TRISTAN
• TAU2014 Opening Talk
• Searches for Exotic Phenomena at ATLAS and CMS