Search for Displaced Supersymmetry in events with an electron and a muon with large impact parameters

Abstract

A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at sqrt(s) = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 inverse femtobarns. Events are selected with an electron and a muon that have transverse impact parameter values between 0.02 cm and 2 cm. The search has been designed to be sensitive to a wide range of models with nonprompt e-mu final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-mu final state via R-parity-violating interactions. The results are the most restrictive to date on this model, with the most stringent limit being obtained for a top squark lifetime corresponding to c tau = 2 cm, excluding masses below 790 GeV at 95% confidence level.

arXiv commentReplaced with published version. Added journal reference and DOI

References in corpus (44)

• 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
• FastJet user manual
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• MadGraph 5 : Going Beyond
• New parton distributions for collider physics
• Theories with Gauge-Mediated Supersymmetry Breaking
• R-parity violating supersymmetry
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Identification of b-quark jets with the CMS experiment
• NLO single-top production matched with shower in POWHEG: s- and t-channel contributions
• NLO vector-boson production matched with shower in POWHEG
• Simplified Models for a First Characterization of New Physics at the LHC
• Stable Massive Particles at Colliders
• Discovering the Higgs Through Highly-Displaced Vertices
• Measurements of Inclusive W and Z Cross Sections in pp Collisions at sqrt(s)=7 TeV
• Phenomenology of Hidden Valleys at Hadron Colliders
• The PDF4LHC Working Group Interim Report
• Searches for long-lived charged particles in pp collisions at sqrt(s) = 7 and 8 TeV
• Phenomenology of the minimal B-L extension of the Standard model: Z' and neutrinos
• Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at sqrt(s) = 7 TeV
• Search for charginos nearly mass-degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Interpretation of searches for supersymmetry with simplified models
• Signatures of long-lived gluinos in split supersymmetry
• Displaced Supersymmetry
• Searches for heavy long-lived sleptons and R-Hadrons with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for long-lived stopped R-hadrons decaying out-of-time with pp collisions using the ATLAS detector
• Search for non-pointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV $pp$ collisions at the LHC using the ATLAS detector
• Search for long-lived, heavy particles in final states with a muon and multi-track displaced vertex in proton-proton collisions at sqrt(s)=7 TeV with the ATLAS detector
• Search for gauge mediated SUSY breaking topologies in e+e- collisions at centre-of-mass energies up to 209GeV
• Search for long-lived, multi-charged particles in pp collisions at sqrt(s)=7 TeV using the ATLAS detector
• Search in leptonic channels for heavy resonances decaying to long-lived neutral particles
• Search for stopped long-lived particles produced in pp collisions at sqrt(s) = 7 TeV
• Search for long-lived particles in events with photons and missing energy in proton-proton collisions at sqrt(s) = 7 TeV
• Searches for Gauge-Mediated Supersymmetry Breaking Topologies in e+e- collisions at LEP2
• Search for Neutral, Long-lived Particles Decaying into Two Muons in p-pbar Collisions at sqrt(s) = 1.96 TeV
• Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at sqrt(s) = 7 TeV

Cited by in corpus (42)

• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• A neutrinoless double beta decay master formula from effective field theory
• Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for heavy neutral leptons in decays of $W$ bosons produced in 13 TeV $pp$ collisions using prompt and displaced signatures with the ATLAS detector
• Collider Searches for Long-Lived Particles Beyond the Standard Model
• Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in $\sqrt{s}$ = 13 TeV $pp$ collisions with the ATLAS detector
• Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at sqrt(s) = 8 TeV
• LHC-friendly minimal freeze-in models
• Limits on the Higgs boson lifetime and width from its decay to four charged leptons
• Probing the scotogenic FIMP at the LHC
• Shedding Light on Neutrino Masses with Dark Forces
• The Fate of Long-Lived Superparticles with Hadronic Decays after LHC Run 1
• Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models
• Long-Lived Staus and Displaced Leptons at the LHC
• Search for pair production of second-generation leptoquarks at $\sqrt{s}=$ 13 TeV
• Search for long-lived particles decaying into displaced jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for long-lived particles in final states with displaced dimuon vertices in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Search for long-lived, massive particles in events with a displaced vertex and a muon with large impact parameter in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for displaced leptons in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Data-driven Model-independent Searches for Long-lived Particles at the LHC
• Search for long-lived particles with displaced vertices in multijet events in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• A feeble window on leptophilic dark matter
• Unleashing the full power of LHCb to probe Stealth New Physics
• Search for Long-Lived Heavy Neutrinos at the LHC with a VBF Trigger
• Probing Bino-Wino Coannihilation at the LHC
• Looking for the left sneutrino LSP with displaced-vertex searches
• Confronting Dark Matter Freeze-In during Reheating with Constraints from Inflation
• Search for long-lived particles decaying to leptons with large impact parameter in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Novel signatures for long-lived particles at the LHC
• Enhanced Long-Lived Dark Photon Signals at the LHC
• Searching for Metastable Particles with Sub-Millimeter Displaced Vertices at Hadron Colliders
• Long-Lived, Colour-Triplet Scalars from Unnaturalness
• Right-handed neutrinos: the hunt is on!
• Dark matter as the source of neutrino mass: theory overview and experimental prospects
• Long-lived charged particles and multi-lepton signatures from neutrino mass models
• Constraining electroweak and strongly charged long-lived particles with CheckMATE
• Hunting for neutral, long-lived exotica at the LHC using a missing transverse energy signature
• Unified Maximally Natural Supersymmetry
• Getting Stuck: Using Monosignatures to Test Highly Ionizing Particles
• Search for long-lived particles at CMS
• Searches for Prompt $R$-Parity-Violating Supersymmetry at the LHC