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Related Experiment Videos

Search for Z' --> e+ e- using dielectron mass and angular distribution.

A Abulencia1, D Acosta, J Adelman

  • 1University of Illinois, Urbana, Illinois 61801, USA.

Physical Review Letters
|June 29, 2006
PubMed

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Summary
This summary is machine-generated.

Researchers searched for Z

Area of Science:

  • Particle Physics
  • High-Energy Physics
  • Collider Physics

Background:

  • The Standard Model of particle physics does not predict the existence of Z' bosons.
  • Extensions to the Standard Model, such as Grand Unified Theories, often predict new heavy neutral gauge bosons (Z').

Purpose of the Study:

  • To search for evidence of Z' bosons decaying into electron-positron pairs.
  • To set limits on the mass and properties of potential Z' bosons using experimental data.

Main Methods:

  • Analysis of proton-antiproton collision data collected by the Collider Detector at Fermilab II.
  • Identification of dielectron events and examination of their invariant mass and angular distributions.
  • Statistical analysis to set 95% confidence level lower limits on Z' boson properties.

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Main Results:

  • No significant excess of dielectron events consistent with Z' boson production was observed.
  • Lower limits were placed on the Z' boson mass for various theoretical models.
  • Constraints were derived for the mass and gauge coupling of a generic Z', and for contact-interaction mass scales.

Conclusions:

  • The absence of a signal places constraints on theories predicting Z' bosons within the studied energy range.
  • The results contribute to the ongoing search for physics beyond the Standard Model at the Fermilab Tevatron.