Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s}=8$ TeV $pp$ collisions using the ATLAS detector

Abstract

A low-background inclusive search for new physics in events with same-sign dileptons is presented. The search uses proton-proton collisions corresponding to 20.3 fb${}^{-1}$ of integrated luminosity taken in 2012 at a centre-of-mass energy of 8 TeV with the ATLAS detector at the LHC. Pairs of isolated leptons with the same electric charge and large transverse momenta of the type $e^{\pm }{e}^{\pm },e^{\pm }{\mu }^{\pm }$, and ${\mu }^{\pm }{\mu }^{\pm }$ are selected and their invariant mass distribution is examined. No excess of events above the expected level of Standard Model background is found. The results are used to set upper limits on the cross-sections for processes beyond the Standard Model. Limits are placed as a function of the dilepton invariant mass within a fiducial region corresponding to the signal event selection criteria. Exclusion limits are also derived for a specific model of doubly charged Higgs boson production.

arXiv comment32 pages plus author list + cover pages (54 pages total), 5 figures, 9 tables, published version, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2012-25/

References in corpus (66)

• 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
• Parton distributions for the LHC
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• MadGraph 5 : Going Beyond
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Matching NLO QCD computations and parton shower simulations
• The ATLAS Simulation Infrastructure
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• MadGraph/MadEvent v4: The New Web Generation
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Pileup subtraction using jet areas
• The Search for Heavy Majorana Neutrinos
• Vector boson pair production at the LHC
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• MCFM for the Tevatron and the LHC
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• NNLL resummation for s-channel single top quark production
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• The PDF4LHC Working Group Interim Recommendations
• Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
• Simplified Models for a First Characterization of New Physics at the LHC
• Distinguishing seesaw models at LHC with multi-lepton signals
• Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS
• Measurement of $J/\psi$ helicity distributions in inelastic photoproduction at HERA
• Top Quark Seesaw Theory of Electroweak Symmetry Breaking
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• t \bar{t} W production and decay at NLO
• Single and Pair Production of Doubly Charged Higgs Bosons at Hadron Colliders
• Doubly charged Higgs at LHC
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Type-III see-saw at LHC
• A Note on Doubly-Charged Higgs Pair Production at Hadron Colliders
• Realistic Composite Higgs Models
• Search for doubly-charged Higgs bosons in like-sign dilepton final states at sqrt(s) = 7 TeV with the ATLAS detector
• Search for supersymmetry at $\sqrt{s}=13$ TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector
• Search for new physics in events with same-sign dileptons and jets in pp collisions at sqrt(s) = 8 TeV
• Prospects for the Zee-Babu Model at the LHC and low energy experiments
• Search for new physics in events with same-sign dileptons and b-tagged jets in pp collisions at sqrt(s) = 7 TeV
• Discovering Supersymmetry with Like-sign Dileptons
• Next-to-leading order QCD corrections to W+W+jj and W-W-jj production via weak-boson fusion
• Low Scale Flavor Gauge Symmetries
• Top quark pair production in association with a Z-boson at NLO accuracy
• Lepton number violation at the LHC with leptoquark and diquark
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Muon reconstruction efficiency and momentum resolution of the ATLAS experiment in proton-proton collisions at $\sqrt{s}$=7 TeV in 2010
• Testing a Neutrino Mass Generation Mechanism at the Large Hadron Collider
• Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV
• Correlative signatures of heavy Majorana neutrinos and doubly-charged Higgs bosons at the Large Hadron Collider
• Inclusive Search for New Physics with Like-Sign Dilepton Events in ppbar Collisions at sqrt{s} = 1.96 TeV
• Search for same-sign top-quark production and fourth-generation down-type quarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for new phenomena in events with three or more charged leptons in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for new physics in high $p_T$ like-sign dilepton events at CDF~II
• Search for strong gravity signatures in same-sign dimuon final states using the ATLAS detector at the LHC
• Search for anomalous production of prompt like-sign lepton pairs at sqrt(s) = 7 TeV with the ATLAS detector
• Multi-lepton signals from the top-prime quark at the LHC

Cited by in corpus (80)

• Neutrino Non-Standard Interactions: A Status Report
• Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos
• Probing the Higgs Sector of the Minimal Left-Right Symmetric Model at Future Hadron Colliders
• Di-photon resonance around 750 GeV: shedding light on the theory underneath
• Lepton Number Violation in Higgs Decay at LHC
• Search for new phenomena in events with same-charge leptons and $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Displaced vertex signatures of doubly charged scalars in the type-II seesaw and its left-right extensions
• Higgs Sector of the Left-Right Symmetric Theory
• Search for new physics in same-sign dilepton events in proton-proton collisions at sqrt(s) = 13 TeV
• Search for heavy lepton resonances decaying to a $Z$ boson and a lepton in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton-proton collisions at sqrt(s) = 13 TeV
• Derivation of Dark Matter Parity from Lepton Parity
• Probing Doubly Charged Higgs Bosons at the LHC through Photon Initiated Processes
• LHC Phenomenology of Type II Seesaw: Nondegenerate Case
• All the generalized Georgi-Machacek models
• Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of jet charge in dijet events from sqrt(s)=8 TeV pp collisions with the ATLAS detector
• Perturbativity and mass scales of Left-Right Higgs bosons
• Distinguishing Dirac/Majorana Sterile Neutrinos at the LHC
• The Scalar Triplet Contribution to Lepton Flavour Violation and Neutrinoless Double Beta Decay in Left-Right Symmetric Model
• Low scale type II seesaw: Present constraints and prospects for displaced vertex searches
• Global fits in the Georgi-Machacek model
• Displaced Photon Signal from a Light Scalar in Minimal Left-Right Symmetric Model
• Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Standard Model Effective Field Theory: Integrating out a Generic Scalar
• Three Loop Neutrino Model with Isolated $k^{\pm \pm }$
• LHC 750 GeV Diphoton excess in a radiative seesaw model
• Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb${}^{-1}$ of proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• $SU(2{)}_L$ triplet scalar as the origin of the 95 GeV excess?
• W-boson mass in the triplet seesaw model
• Search for type-III seesaw heavy leptons in dilepton final states in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Three-loop Neutrino Mass Model with Doubly Charged Particles from Iso-Doublets
• Vacuum stability and naturalness in type-II seesaw
• Exploding operators for Majorana neutrino masses and beyond
• Type II Radiative Seesaw Model of Neutrino Mass with Dark Matter
• Light Sterile Neutrino and Dark Matter in Left-Right Symmetric Models Without Higgs Bidoublet
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Scalar decays to $\gamma \gamma$, $Z\gamma$, and $W\gamma$ in the Georgi-Machacek model
• Phenomenology of the Higgs sector of a Dimension-7 Neutrino Mass Generation Mechanism
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• Signatures of Dirac and Majorana Sterile Neutrinos in Trilepton Events at the LHC
• Neutrino Mass Generation at TeV Scale and New Physics Signatures from Charged Higgs at the LHC for Photon Initiated Processes
• Reconciling $(g-2{)}_{\mu }$ and charged lepton flavour violating processes through a doubly charged scalar
• Dead or Alive? Implications of the Muon Anomalous Magnetic Moment for 3-3-1 Models
• Probing $(g-2{)}_{\mu }$ at the LHC in the paradigm of R-parity violating MSSM
• Flavour and dark matter in a scoto/type-II seesaw model
• Lepton Number Violation: Seesaw Models and Their Collider Tests
• A benchmark for LHC searches for low-mass custodial fiveplet scalars in the Georgi-Machacek model
• Unavoidable Higgs coupling deviations in the $Z_2$-symmetric Georgi-Machacek model
• Low-mass doubly-charged Higgs bosons at LHC
• LHC signals of radiatively-induced neutrino masses and implications for the Zee-Babu model
• Testing Type II Radiative Seesaw Model: from Dark Matter Detection to LHC Signatures
• Single Higgs production in association with a photon at electron-positron colliders in extended Higgs models
• Confronting the DAMPE Excess with the Scotogenic Type-II Seesaw Model
• Physics with Leptons and Photons at the LHC
• Type-II see-saw: searching the LHC elusive low-mass triplet-like Higgses at $e^{-}{e}^{+}$ colliders
• Light Sterile Neutrinos, Lepton Number Violating Interactions and the LSND Anomaly
• Updated constraints on the Georgi-Machacek model from LHC Run 2
• Probing compressed mass spectra in the type-II seesaw model at the LHC
• Search for a lighter neutral custodial fiveplet scalar in the Georgi-Machacek model
• Neutrino-axion-dilaton interconnection
• Review of Searches for Rare Processes and Physics Beyond the Standard Model at HERA
• Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
• Distinguishing Neutrino Mass Hierarchies using Dark Matter Annihilation Signals at IceCube
• Exclusive doubly charged Higgs boson pair production in $pp$ collisions at the LHC
• SU(5)-inspired double beta decay
• Composite Higgs Models with a Hidden Sector
• Search for like-sign dileptons plus two jets signal in the framework of the manifest left-right symmetric model
• Hadron Collider Signatures of Lepton Number Violation in the Type II Seesaw Model
• Searching for spin-3/2 leptons
• The effects of triplet Higgs bosons in long baseline neutrino experiments
• Schramm-Loewner evolution in the random scatterer Henon-percolation landscapes
• Multi-charged TeV scale scalars and fermions in the framework of a radiative seesaw model
• Effect of large light-heavy neutrino mixing and natural type-II seesaw dominance to lepton flavor violation and neutrinoless double beta decay
• Scalar dark matter with $Z_3$ symmetry in Type-II Seesaw
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry
• Constraints on exotic particle masses from flavor violating charged lepton decays and the role of interference
• Investigating the leptonic couplings of doubly charged scalars at the muon collider
• Globally maximal timelike geodesics in static spherically symmetric spacetimes: radial geodesics in static spacetimes and arbitrary geodesic curves in ultrastatic spacetimes
• Radiative neutrino masses: A window to new physics