CDF Logo Search for New Particles Decaying into b-Quarks and Produced in Association with a W Boson Exotics Logo
We present searches for new particles decaying into b,bbar and produced in association with W+- bosons in p,pbar collisions at sqrt(s) = 1.96 TeV. The searches focus on the Standard Model Higgs or technicolor particle decaying into b,bbar using approximately 162 pb^-1 of the dataset accumulated by the updated Collider Detector at Fermilab. Events with an electron or muon, missing E_T and two jets, one of them b-tagged, are selected. The number of tagged events and the dijet mass distribution are consistent with the Standard Model expectations and we set a 95% confidence level upper limit on the production cross section times branching ratio as a function of the new particle masses. The sensitivity of the present searches is limited by statistics to a cross section approximately one orders of magnitude higher than the predicted cross section for the Standard Model Higgs boson production, but is getting close to some of theoretical cross section for technicolor particle production.


Blessed Plots and Tables:

Theoretical Cross-Sections and Branching Ratios:
Theoretical production cross-section for Higgs production at the Fermilab Tevatron, EPS, JPG, or GIF.
Branching ratios of Standard Model Higgs for the different decay channels, EPS, JPG, or GIF.
Theoretical production cross-section times branching ratios for technicolor rho production decaying via techni-pi into W and b,bbar (as function of techni-rho mass), EPS, JPG, or GIF.
Theoretical production cross-section times branching ratios for technicolor rho production decaying via techni-pi into W and b,bbar (as function of techni-rho mass and techni-pi mass of 90 GeV/c**2), EPS, JPG, or GIF.
Theoretical production cross-section times branching ratios for technicolor rho production decaying via techni-pi into W and b,bbar (techni-rho mass of 200 GeV/**2 and as function of techni-pi mass), EPS, JPG, or GIF.

Event Numbers, N-Jet, and Di-Jet Mass Spectrum Before/After b-Tagging:
The table with the estimated number of events, EPS, JPG, or GIF. The W + 2 jets is the search region.
Jet multiplicity distribution after b-tag, EPS, JPG, or GIF. The 2 jets bin is the search region.
The di-jet mass distribution before b-tag, EPS, JPG, or GIF.
The di-jet mass distribution after b-tag (with WH of 115 GeV/c**2 Higgs mass), EPS, JPG, or GIF.
The di-jet mass distribution after b-tag (with techni-rho of 115 GeV/c**2 techni-pi mass), EPS, JPG, or GIF.

Technicolor Rho Search:
The lepton-missing E_T-jet-jet mass distribution after b-tag, EPS, JPG, or GIF.

Signal Acceptances:
The acceptance of W Higgs events as function of Higgs mass, EPS, JPG, or GIF.
The acceptance of technicolor rho events as function of techni-rho mass, EPS, JPG, or GIF.

95% Confidence Level Limits:
Cross-section times branching ratio limit as function of new particle mass, EPS, JPG, or GIF.
Cross-section times branching ratio limit as function of techni-rho mass, EPS, JPG, or GIF.

Higgs Significance Comparison:
Comparison of Run I Higgs searches Significance, Higgs Sensitivity Report (HSR), and this analysis, EPS, JPG, or GIF.

Page page: http://www-cdf.fnal.gov/physics/exotic/r2a/20040722.lmetbj_wh_tc/index.html was last updated October 29th, 2004 by Stephan Lammel.
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