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Updated: Jun 14, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for technicolor particles produced in association with a W Boson at CDF
T Aaltonen1, J Adelman, B Alvarez González
1Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.
This study searched for technicolor particles rho{T} and pi{T} using CDF II data. The results are consistent with the Standard Model, excluding a significant mass region for these hypothetical particles.
Area of Science:
- High Energy Physics
- Particle Physics
- Beyond Standard Model Physics
Background:
- Technicolor theory proposes new particles like rho{T} and pi{T} as alternatives to the Higgs boson.
- Searches for these particles are crucial for understanding electroweak symmetry breaking.
Purpose of the Study:
- To search for technicolor particles rho{T} and pi{T} in proton-proton collisions.
- To test predictions of technicolor models at the TeV energy scale.
Main Methods:
- Analysis of pp collisions at sqrt[s]=1.96 TeV using 1.9 fb{-1} of CDF II data.
- Selection of events with a W boson (lepton+neutrino) and a pi{T} decaying into bottom quarks (bb, bc, bu).
- Utilized high-p{T} leptons, large missing transverse energy, and sophisticated b-jet tagging algorithms.
Main Results:
- Observed event counts and invariant mass distributions align with Standard Model background predictions.
- A 95% confidence level exclusion is placed on a specific region of the rho{T}-pi{T} mass plane.
- Excluded m(rho{T})=180-250 GeV/c{2} and m(pi{T})=95-145 GeV/c{2}.
Conclusions:
- The search found no evidence for technicolor particles rho{T} and pi{T} within the explored mass ranges.
- This result constrains technicolor models and favors other explanations for electroweak symmetry breaking.
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