Measurement of ww + wz production cross section and study of the dijet mass spectrum in the lnu + jets final state at CDF [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy. Office of Science, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 173 pages : digital, PDF file
- Additional Creators:
- Fermi National Accelerator Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- We present the measurement of the WW and WZ production cross section in p{bar p} collisions at √s = 1.96 TeV, in a final state consisting of an electron or muon, neutrino and jets. The data analyzed were collected by the CDF II detector at the Tevatron collider and correspond to 4.3 fb⁻¹ of integrated luminosity. The analysis uses a fit to the dijet mass distribution to extract the diboson contribution. We observe 1582 ± 275(stat.) ± 107(syst.) diboson candidate events and measure a cross section of σ{sub WW/WZ} = 18.1 ± 3.3(stat.) ± 2.5(syst.) pb, consistent with the Standard Model prediction of 15.9 ± 0.9 pb. The best fit to the dijet mass of the known components shows a good agreement with the data except for the [120, 160] GeV/c² mass range, where an excess is observed. We perform detailed checks of our background model and study the significance of the excess, assuming an additional gaussian component with a width compatible with the expected dijet mass resolution. A standard Δ{sub χ}² test of the presence of the additional component, returns a p-value of 4.2 x 10⁻⁴ when standard sources of systematics are considered, corresponding to a significance of 3.3σ.
- Report Numbers:
- E 1.99:fermilab-thesis-2010-51
fermilab-thesis-2010-51 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
12/01/2010.
"fermilab-thesis-2010-51"
Cavaliere, Viviana. - Funding Information:
- AC02-07CH11359
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