Trilepton production at the CERN LHC: Standard model sources and beyond

Abstract

Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as $WZ$ and $W{\gamma }^{\ast }$, and $t\bar{t}$ production. We demonstrate that leptons from heavy flavor decays, such as $b\to lX$ and $c\to lX$, provide sources of trileptons that can be orders-of-magnitude larger after cuts than other standard model backgrounds to new physics processes. We explain the physical reason heavy flavor backgrounds survive isolation cuts. We propose new cuts to control the backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models. After these cuts are imposed, we show that it should be possible to find at least a 4 sigma excess for supersymmetry parameter space point LM9 with 30 fb${}^{-1}$ of integrated luminosity.

33 pgs, 17 figs, revtex; repaired damaged latex source

References in corpus (34)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• High-Energy-Physics Event Generation with PYTHIA 6.1
• An update on vector boson pair production at hadron colliders
• MadEvent: Automatic Event Generation with MadGraph
• The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
• Supersymmetry Parameter Analysis: SPA Convention and Project
• Signals for Minimal Supergravity at the CERN Large Hadron Collider II: Multilepton Channels
• Electroweak constraints on warped models with custodial symmetry
• Vector Boson Pair Production in Hadronic Collisions at Order ${\alpha }_s$: Lepton Correlations and Anomalous Couplings
• Is There a Significant Excess in Bottom Hadroproduction at the Tevatron?
• Helicity Amplitudes for $\mathcal{O}({\alpha }_s)$ Production of $W^{+}{W}^{-},W^{\pm }Z,ZZ,W^{\pm }\gamma ,$ or $Z\gamma$ Pairs at Hadron Colliders
• Trileptons from Chargino-Neutralino Production at the CERN Large Hadron Collider
• Model Independent Approach to Focus Point Supersymmetry: from Dark Matter to Collider Searches
• Collider Phenomenology for Supersymmetry at Large $tan\beta$
• LHC Signatures of New Gauge Bosons in the Minimal Higgsless Model
• Supersymmetry Reach of Tevatron Upgrades: The Large $\tan \beta$ Case
• Aspects of Chargino-Neutralino Production at the Tevatron Collider
• Chargino and Neutralino Decays Revisited
• Search for Doubly-charged Higgs Boson Pair Production in the Decay to mu+mu+mu-mu- in p pbar Collisions at s**1/2=1.96 TeV
• Trilepton Signal for Supersymmetry at the Fermilab Tevatron Revisited
• Trilepton Signature of Minimal Supergravity at the Upgraded Tevatron
• TopReX generator (version~3.25). Short manual
• Supersymmetry Reach of the Tevatron via Trilepton, Like-Sign Dilepton and Dilepton plus Tau Jet Signatures
• New backgrounds in Trilepton, Dilepton and Dilepton plus Tau Jet SUSY Signals at the Tevatron
• Supersymmetry Tests at Fermilab: A Proposal
• Trilepton Signal of Minimal Supergravity at the Tevatron Including $\tau$-lepton Contributions
• Possible Signals of Constrained Minimal Supersymmetry at a High Luminosity Fermilab Tevatron Collider
• Double parton scatterings in b-quark pairs production at the LHC
• Search for Supersymmetry via Associated Production of Charginos and Neutralinos in Final States with Three Leptons
• Early SUSY discovery at LHC without missing E_T: the role of multi-leptons
• Supersymmetry dileptons and trileptons at the Tevatron
• Missing heavy flavor backgrounds to Higgs boson production
• Search for chargino-neutralino production in p-pbar collisions at 1.96 TeV with high pT leptons
• Fast Evaluation of CTEQ Parton Distributions in Monte Carlos

Cited by in corpus (34)

• Naturalness, Supersymmetry and Implications for LHC and Dark Matter
• Trilepton Signals in the Inert Doublet Model
• Multi-Lepton Collider Signatures of Heavy Dirac and Majorana Neutrinos
• Probing Nonstandard Standard Model Backgrounds with LHC Monojets
• Characteristics and Estimates of Double Parton Scattering at the Large Hadron Collider
• Minimal Matter at the Large Hadron Collider
• Distinguishing Dirac/Majorana Sterile Neutrinos at the LHC
• Heavy lepton pair production at LHC: model discrimination with multi-lepton signals
• Low Mass Gluino within the Sparticle Landscape, Implications for Dark Matter, and Early Discovery Prospects at LHC-7
• Many faces of low mass neutralino dark matter in the unconstrained MSSM, LHC data and new signals
• Multiple Parton Interactions in Z+4j, W\pm W\pm +0/2j and W+ W- +2j production at the LHC
• Predictive Signatures of Supersymmetry: Measuring the Dark Matter Mass and Gluino Mass with Early LHC data
• Low mass neutralino dark matter in mSUGRA and more general models in the light of LHC data
• Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings
• Identifying Multi-Top Events from Gluino Decay at the LHC
• Non-universal gaugino and scalar masses, hadronically quiet trileptons and the Large Hadron Collider
• Signatures of Dirac and Majorana Sterile Neutrinos in Trilepton Events at the LHC
• Standard Model backgrounds to supersymmetry searches
• Observable Seesaw and its Collider Signatures
• Multijet Discriminators for New Physics in Leptonic Signals at the LHC
• Same-sign trileptons and four-leptons as signatures of new physics at the Large Hadron Collider
• Isolated leptons from heavy flavor decays: Theory and data
• On Measuring Split-SUSY Neutralino and Chargino Masses at the LHC
• Higgs Boson Search Sensitivity in the $H\to WW$ Dilepton Decay Mode at $\sqrt{s}=7$ and 10 TeV
• Tau-Sneutrino NLSP and Multilepton Signatures at the LHC
• Same-sign trileptons at the LHC: a window to lepton-number violating supersymmetry
• Discovery Potential of Selectron or Smuon as the Lightest Supersymmetric Particle at the LHC
• CP asymmetries in the supersymmetric trilepton signal at the LHC
• SUSY CP phases and asymmetries at colliders
• Tracking down the elusive charginos / neutralinos through $\tau$ leptons at the Large Hadron Collider
• Slepton Discovery in Electroweak Cascade Decay
• Neutrino physics beyond neutrino masses
• Discovering a Nonstandard Higgs in a Standard Way
• Trilepton production at the CERN LHC: SUSY Signals and Standard Model Backgrounds