Search for W Boson Pair Production in the Lepton + Jet Channel in 1.8-TeV Proton - Antiproton Collisions
- Tsukuba U.
CDF collaboration searched for W pair production in the dilepton channel, $$W^+ W^- \to \ell\nu \ell\nu$$, and reported an evidence in 1996. CDF found five signal candidate events while the expected number of background events is 1.2 $$\pm$$ 0.3, and extracted the cross section $$\sigma(p\bar{p} \to W^+W^-$$) = $$10.2 ^{+6.3}_ {-5.1}$$(stat) $$\pm$$ 1.6(syst) pb. In the present study, we search for $W^+W^-$ production in the lepton plus dijet channel, $$W^+W^- \to \ell\nu jj$$, using 106 $$pb^{-1}$$ data sample. To separate signals from backgrounds we use conventional variables that discriminate between quark and gluon jets, such as jet charge, track multiplicity, and charm-jet tagging. In addition, we study variables taking advantage of event characteristics that are specific to the $W^+W^-$ final state, such as pseudo-rapidity asymmetry, azimuthal correlations, and dijet mass. We set a 95% C.L. upper limit of 61 pb on the $W^+W^-$ production cross-section.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1419228
- Report Number(s):
- FERMILAB-THESIS-2003-13; 621038
- Country of Publication:
- United States
- Language:
- English
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