# Search for Technicolor Particles Produced in Association with a W Boson at CDF

Abstract : We present a search for the technicolor particles $\rho_{T}$ and $\pi_{T}$ in the process $p\bar{p} \to \rho_{T} \to W\pi_{T}$ at a center of mass energy of $\sqrt{s}=1.96 \mathrm{TeV}$. The search uses a data sample corresponding to approximately $1.9 \mathrm{fb}^{-1}$ of integrated luminosity accumulated by the CDF II detector at the Fermilab Tevatron. The event signature we consider is $W\to \ell\nu$ and $\pi_{T} \to b\bar{b}, b\bar{c}$ or $b\bar{u}$ depending on the $\pi_{T}$ charge. We select events with a single high-$p_T$ electron or muon, large missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with multiple $b$-tagging algorithms. The observed number of events and the invariant mass distributions are consistent with the standard model background expectations, and we exclude a region at 95% confidence level in the $\rho_T$-$\pi_T$ mass plane. As a result, a large fraction of the region $m(\rho_T) = 180$ - $250 \mathrm{GeV}/c^2$ and $m(\pi_T) = 95$ - $145 \mathrm{GeV}/c^2$ is excluded.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00473773
Contributor : Swarna Bassava <>
Submitted on : Friday, April 16, 2010 - 2:00:12 PM
Last modification on : Wednesday, September 15, 2021 - 2:56:02 PM

### Citation

T. Aaltonen, J. Adelman, B. Alvarez Gonzalez, S. Amerio, D. Amidei, et al.. Search for Technicolor Particles Produced in Association with a W Boson at CDF. Physical Review Letters, American Physical Society, 2010, 104, pp.111802. ⟨10.1103/PhysRevLett.104.111802⟩. ⟨in2p3-00473773⟩

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