Low energy supersymmetry with a neutralino LSP and the CDF eeγγ+ missing E_T event

Abstract

We present a refined and expanded analysis of the CDF $eeγγ+ \Et$ event as superpartner production, assuming the lightest neutralino is the lightest supersymmetric particle. A general low-energy Lagrangian is constrained by a minimum cross section times branching ratio into two electrons and two photons, kinematics consistent with the event, and LEP1-LEP130 data. We examine how the supersymmetric parameters depend on the kinematics, branching ratios and experimental predictions with a selectron interpretation of the event, and discuss to what extent these are modified by other interpretations. Predictions for imminent CERN LEP upgrades and the present and future Fermilab Tevatron are presented. Finally, we briefly discuss the possible connection to other phenomena including a light stop, the neutralino relic density, the shift in $R_b$ and the associated shift in ${\alpha }_s$, and implications for the form of the theory.

arXiv comment57 pages, LaTeX, uses epsf.sty, 19 figures. Version accepted for publication in Phys. Rev. D, with minor changes and a few clarifications

References in corpus (26)

• Study of Constrained Minimal Supersymmetry
• ANALYTICAL EXPRESSIONS FOR RADIATIVELY CORRECTED HIGGS MASSES AND COUPLINGS IN THE MSSM
• Global QCD Analysis and the CTEQ Parton Distributions
• Effective potential methods and the Higgs mass spectrum in the MSSM
• The Supersymmetric Particle Spectrum
• Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking
• Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP colliders
• Supersymmetric analysis and predictions based on the CDF eeγγ+ missing E_T event
• Detecting Sleptons at Hadron Colliders and Supercolliders
• Implications of the Partial Width Z->bb for Supersymmetry Searches and Model-Building
• Implications of Low Energy Supersymmetry Breaking at the Tevatron
• Determining ${\alpha }_s$ from Measurements at $Z$: How Nature Prompts us about New Physics
• Implications of High Precision Experiments and the CDF Top Quark Candidates
• Possible Signals of Constrained Minimal Supersymmetry at a High Luminosity Fermilab Tevatron Collider
• Implications of the reported deviations from the standard model for Z->bb and alpha_s
• Supersymmetric Scenarios with Dominant Radiative Neutralino Decay
• The Light Higgsino-Gaugino Window
• Do About Half the Top Quarks at FNAL Come From Gluino Decays?
• Chargino Mass and $R_b$ Anomaly
• Higgsino Cold Dark Matter Motivated by Collider Data
• Precision tests of the MSSM
• Neutralino Production as SuSy Discovery Process at CERN LEP2
• Four-Generation Low Energy Supersymmetry with a Light Top Quark
• Is the ee gamma gamma+ Missing E(T) Event an Evidence of the Light Axino?
• A Non-supersymmetric Interpretation of the CDF e+e-γγ+ missing E_T Event
• $Z\to b\bar{b}$ in $U(1{)}_R$ Symmetric Supersymmetry

Cited by in corpus (42)

• Generalized messengers of supersymmetry breaking and the sparticle mass spectrum
• Single- and Multi-Photon Events with Missing Energy in e+e- Collisions at LEP
• Signals for gauge-mediated supersymmetry breaking models at the CERN LEP2 collider
• Tevatron Signatures of Long-lived Charged Sleptons in Gauge-Mediated Supersymmetry Breaking Models
• Searches for New Physics in Diphoton Events in proton anti-proton collisions at sqrt(s)=1.8TeV
• Searches for New Physics in Diphoton Events in proton anti-proton collisions at sqrt(s)=1.8TeV
• Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II
• Single and Multi-Photon Events with Missing Energy in e+e- Collisions at \sqrt{s} = 189 GeV
• Supersymmetric Contributions to the Decay of an Extra Z Boson
• Neutralino decay in the $\mu$-problem solvable extra U(1) models
• Measurement of $W\gamma$ and $Z\gamma$ Production in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV
• Single-photon signals at LEP in supersymmetric models with a light gravitino
• Search for Diphoton Events with Large Missing Transverse Energy in proton-antiproton collisions at sqrt(s) = 1.8 TeV
• Radiative Neutralino Decay in Supersymmetric Models
• Search for Anomalous Production of Diphoton Events with Missing Transverse Energy at CDF and Limits on Gauge-Mediated Supersymmetry-Breaking Models
• Experimental consequences of no-scale supergravity in light of the CDF $ee\gamma \gamma$ event
• Probing Gauge-Mediated Supersymmetry Breaking Through Polarized Electron Beams in an $e^{+}{e}^{-}$ Collider
• Searches for Supersymmetry in the photon(s) plus missing energy channels at $\sqrt{s}$ = 161 GeV and 172 GeV
• Search for Anomalous Production of Events with Two Photons and Additional Energetic Objects at CDF
• Search for Squarks and Gluinos in Single-Photon Events with Jets and Large Missing Transverse Energy in ppbar Collisions at SQRT(S)=1.8 TeV
• Multilepton signatures of gauge mediated SUSY breaking at LEPII
• Search for New Physics in Photon-Lepton Events in pbar-p Collisions at root-s= 1.8 TeV
• Disrupting the one-loop renormalization group invariant M/alpha in supersymmetry
• Search for New Physics in Lepton + Photon + X Events with 929 pb-1 of ppbar Collisions at roots = 1.96 TeV
• Search for New Physics in Photon-Lepton Events in Proton-Antiproton Collisions at sqrt(s) = 1.8 TeV
• Search for Non-standard Higgs Boson in Diphoton Events at p pbar Collisions
• Searches for New Physics in Events with a Photon and b-quark Jet at CDF
• The Search for Supersymmetry at the Tevatron Collider
• Gauge Mediated Supersymmetry Signals at the Tevatron Involving Tau Leptons
• Tau Signals at the Tevatron for Gauge Mediated Supersymmetry Breaking
• Explaining Anomalous CDF mu gamma Missing-E_T Events With Supersymmetry
• Resonant slepton production at the LHC in models with an ultralight gravitino
• New Multi-Scale Supersymmetric Models with Flavor Changing Neutral Current Suppression
• Search for New Physics in Lepton + Photon + X Events with L=305 pb-1 of ppbar Collisions at roots=1.96 TeV
• A One-Scale Model of Dynamical Supersymmetry Breaking
• Investigating the Supersymmetric Explanation of Anomalous CDF lepton(s) photon(s) Missing-E_T Events
• Perspectives for Detection of a Higgsino-like Relic Neutralino
• e+ e- Cross Section and Exclusion of Massless Electroweak Gauginos
• Recognizing Superpartners at LEP
• Combined fits to the supersymmetric explanation of anomalous lepton-photon-missing E_T events
• Dark matter in gravity-mediated supersymmetry breaking
• Searches for New Physics in Photon Final States