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تسجيل مستخدم جديدW and Z (plus jets) Production and Asymmetries at 1.96 TeV
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Gavin Hesketh
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This paper reviews the latest results from the Tevatron on W and Z physics, and their use as probes of QCD.
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We present an update on the status of the W and Z cross sections in proton-antiproton collisions at 1.96 TeV on behalf of the DZero and CDF collaborations. Preliminary studies of the differential cross sections with different jet multiplicities and a
s a function of jet transverse energy are also presented.
The most recent results for W and Z boson production cross sections and asymmetries are presented from the CDF and D0 collaborations using Run II data taken at the Fermi National Accelerator Laboritory (FNAL) Tevatron. Data set sizes range from 72pb^
(-1) to 226pb^(-1), and results range from published to preliminary. Results presented agree with the Standard Model and world averages within errors.
The CDF and D0 collaborations performed a comprehensive study of the production of vector bosons, W and Z, in association with energetic jets. Understanding the W/Z + jets and W/Z + c, b-jets processes is of paramount importance for the top quark phy
sics, for the Higgs boson measurements, and for many new physics searches. In this contribution the most recent measurements of the associated production of jets and vector bosons in Run II at the Tevatron are presented. The measurements are compared to different perturbative QCD predictions and to several Monte Carlo generators.
We present a measurement of the $W$-boson-pair production cross section in $pbar{p}$ collisions at 1.96 TeV center-of-mass energy and the first measurement of the differential cross section as a function of jet multiplicity and leading-jet energy. Th
e $W^{+}W^{-}$ cross section is measured in the final state comprising two charged leptons and neutrinos, where either charged lepton can be an electron or a muon. Using data collected by the CDF experiment corresponding to $9.7~rm{fb}^{-1}$ of integrated luminosity, a total of $3027$ collision events consistent with $W^{+}W^{-}$ production are observed with an estimated background contribution of $1790pm190$ events. The measured total cross section is $sigma(pbar{p} rightarrow W^{+}W^{-}) = 14.0 pm 0.6~(rm{stat})^{+1.2}_{-1.0}~(rm{syst})pm0.8~(rm{lumi})$ pb, consistent with the standard model prediction.
We present a study of jet production in association with W and Z bosons in proton-proton collisions at a centre-of-mass energy of 7 TeV using the full 2010 data set collected by CMS corresponding to an integrated luminosity of (35.9 +/- 1.4) inverse
picobarn. We report the measurement of ratios s(V + >= n jets)/s(V) and s(V + >= n jets)/s(V + >= (n - 1) jets), where V represents either a W or a Z, s stands for the cross section and n stands for the number of jets.
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