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

• DOI: 10.48550/arxiv.0808.0226
• Publication Date: 2008-01-01
• Authors: Nagai, Y.; Masubuchi, T.; Kim, S.; Yao, W. -M.
• Keywords: High Energy Physics - Experiment (hep-ex); FOS: Physical sciences; High Energy Physics - Experiment

We present a search for technicolor particles decaying into $b\bar b$, $b\bar c$ or $b\bar u$ and produced in association with $W$ bosons in $p\bar p$ collisions at $\sqrt{s}= 1.96 \mathrm{TeV}$. The search uses approximately $1.9 \mathrm{fb}^{-1}$ of the dataset accumulated in the CDF II detector at the Fermilab Tevatron. We select events matching the $W$ + 2-jets signature and require at least one jets to be identified as $b$-quark jets. In the case of exactly one vertex $b$-tagged events, we apply a neural network flavor separator to reject contamination from charm and light quark jets. The number of tagged events and the invariant mass distributions of $W+2$ jets and dijets are consistent with the Standard Model expectations. We succeed to set a large 95% confidence level excluded region on the $��_{T}$ mass v.s. $��_{T}$ mass plane.<br/>Poster session at the Hadron Collider Physics Symposium (HCP2008), Galena, Illinois, USA, May 27-31, 2008; 5 pages, LaTeX<br/>