Download or read book Measurement of Sigma P Anti p Z Br Z 2tau in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2007 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the inclusive production cross-section for Z bosons decaying to tau leptons in p{bar p} collisions at √s = 1.96 TeV. We use a channel with one hadronically-decaying and one electronically-decaying tau. This measurement is based on 350 pb−1 of CDF Run II data. Using a sample of 504 opposite sign e[tau] events with a total expected background of 190 events, we obtain [sigma](p{bar p} → Z) · [Beta](Z → [tau][tau]) = 263 ± 23(stat) ± 14(syst) ± 15(lumi) pb, in agreement with the next-to-next-to-leading order QCD prediction. This is the first CDF cross section measurement using hadronically-decaying taus in Run II.
Download or read book Measurement of Sigma P Anti p Z Br Z 2tau in P Anti p Collisions at S written by and published by . This book was released on 2007 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the inclusive production cross-section for Z bosons decaying to tau leptons in p{bar p} collisions at √s = 1.96 TeV. We use a channel with one hadronically-decaying and one electronically-decaying tau. This measurement is based on 350 pb−1 of CDF Run II data. Using a sample of 504 opposite sign e? events with a total expected background of 190 events, we obtain?(p{bar p} → Z) ·?(Z →??) = 263 ± 23(stat) ± 14(syst) ± 15(lumi) pb, in agreement with the next-to-next-to-leading order QCD prediction. This is the first CDF cross section measurement using hadronically-decaying taus in Run II.
Download or read book Measurement of Sigma p Anti p Z X Br Z Tau tau at S 1 2 written by and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Sigma p Anti p Z X Br Z Tau tau at S written by and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Measurement of the T Anti t Differential Cross Section D Sigma dM t Anti t in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the t{bar t} differential cross section with respect to the t{bar t} invariant mass, d[sigma]/dM{sub t{bar t}}, in p{bar p} collisions at √s = 1.96 TeV using an integrated luminosity of 2.7 fb−1 collected by the CDF II experiment. The t{bar t} invariant mass spectrum is sensitive to a variety of exotic particles decaying into t{bar t} pairs. The result is consistent with the standard model expectation, as modeled by PYTHIA with CTEQ5L parton distribution functions.
Download or read book First Measurement of the T Anti t Differential Cross Section D Sigma dM t Anti t in P Anti p Collisions at S written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the t{bar t} differential cross section with respect to the t{bar t} invariant mass, d?/dM{sub t{bar t}}, in p{bar p} collisions at √s = 1.96 TeV using an integrated luminosity of 2.7 fb−1 collected by the CDF II experiment. The t{bar t} invariant mass spectrum is sensitive to a variety of exotic particles decaying into t{bar t} pairs. The result is consistent with the standard model expectation, as modeled by PYTHIA with CTEQ5L parton distribution functions.
Download or read book Z gamma Cross Section Measurement sigma BR Z gamma in the Electron Channel for p bar p Collisions at sqrt s written by and published by . This book was released on 1994 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Z+[gamma] cross-section x branching ratio in the electron channel has been measured using the inclusive Z data sample from the CDF '88-'89 collider run, for which the total integrated luminosity was 4.05 ± 0.28 pb-1.
Download or read book Wild gewild gevild written by and published by . This book was released on 1983 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the T Anti t Production Cross Section in P Anti p Collisions at S 1 2 written by Salvatore Rocco Rappoccio and published by . This book was released on 2005 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the measurement of the t{bar t} cross section in the lepton plus jets channel with {ge} 1 and {ge} 2 secondary vertex tags. We use the scalar sum of transverse energies of the event (H{sub T}) to discriminate t{bar t} from the other backgrounds. We also use the transverse mass of the leptonic W-boson (M{sub T}{sup W}) to further reduce the Non-W backgrounds. We use a combination of data and Monte Carlo to estimate the backgrounds from electroweak processes, single top, fake leptons, W+ Light Flavor fake tags, and real W+ Heavy Flavor production. We obtain a value of {sigma} {sub {ge}1} = 8.7{sub -0.9}{sup +0.9}(stat){sub -0.9}{sup +1.2}(sys) pb for the {ge}1 tag cross section, and {sigma}{sub {ge}2} = 8.7{sub -1.6}{sup +1.8}(stat){sub -1.3}{sup +1.9}(sys) pb for the {ge}2 tag cross section. The authors also present a measurement of the t{bar t} cross section by fitting the N{sub jet} spectrum. They combine the =1 and {ge}2 tag cross sections to obtain {sigma}{sub t{bar t}} = 8.9{sub -0.9}{sup +0.9}(stat){sub -1.3}{sup +1.4}(syst)pb.
Download or read book A PRECISION MEASUREMENT OF THE PROMPT PHOTON CROSS SECTION IN P ANTI P COLLISIONS AT SQUARE ROOT OF S written by A. Maghakian and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the T Anti t Production Cross Section in P pbar Collisions at S 1 2 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Not Provided.
Download or read book Z Z Boson Photon Cross section Measurement sigma BR Z Z Boson Photon in the Electron Channel for Pp Collisions at sqrt s written by Mary Roach-Bellino and published by . This book was released on 1994 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Measurement of the Ratio Sigma t tbar written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the ratio of the t{bar t} to Z/[gamma]* production cross sections in √s = 1.96 TeV p{bar p} collisions using data corresponding to an integrated luminosity of up to 4.6 fb−1, collected by the CDF II detector. The t{bar t} cross section ratio is measured using two complementary methods, a b-jet tagging measurement and a topological approach. By multiplying the ratios by the well-known theoretical Z/[gamma]* → ll cross section predicted by the standard model, the extracted t{bar t} cross sections are effectively insensitive to the uncertainty on luminosity. A best linear unbiased estimate is used to combine both measurements with the result [sigma]{sub t{bar t}} = 7.70 ± 0.52 pb, for a top-quark mass of 172.5 GeV/c2.
Download or read book Measurement of the J psi Meson and B hadron Production Cross Sections in P Anti p Collisions at S NN 1 2 written by and published by . This book was released on 2004 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a new measurement of the inclusive and differential production cross sections of J/[psi] mesons and b-hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb−1 collected by the CDF Run II detector. We find the integrated cross section for inclusive J/[psi] production for all transverse momenta from 0 to 20 GeV/c in the rapidity range
Download or read book Measurement of the Isolated Photon Cross Section in P Anti p Collisions at S written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at √s = 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. The photons span transverse momenta 23 to 300 GeV and have pseudorapidity ?
Download or read book Measurement of the T Anti t Production Cross Section in P Anti p Collisions at S written by and published by . This book was released on 2006 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a new measurement of the t{bar t} production cross section in p{bar p} collisions at a center-of-mass energy of 1.96 TeV using events with one charged lepton (electron or muon), missing transverse energy, and jets. Using 425 pb−1 of data collected using the D0 detector at the Fermilab Tevatron Collider, and enhancing the t{bar t} content of the sample by tagging b jets with a secondary vertex tagging algorithm, the t{bar t} production cross section is measured to be:?{sub p{bar p} → t{bar t}+X} = 6.6 ± 0.9(stat + syst) ± 0.4(lum) pb. This cross section is the most precise D0 measurement to date for t{bar t} production and is in good agreement with standard model expectations.
Download or read book Measurement of the T Anti t Production Cross Section in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2006 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the t{bar t} production cross section using events with one charged lepton and jets from p{bar p} collisions at a center-of-mass energy of 1.96 TeV. A b-tagging algorithm based on the probability of displaced tracks coming from the event interaction vertex is applied to identify b quarks from top decay. Using 318 pb−1 of data collected with the CDF II detector, they measure the t{bar t} production cross section in events with at least one restrictive (tight) b-tagged jet and obtain 8.9{sub -1.0}{sup +1.0}(stat.){sub -1.0}{sup +1.1}(syst.) pb. The cross section value assumes a top quark mass of m{sub t} is presented in the paper. This result is consistent with other CDF measurements of the t{bar t} cross section using different samples and analysis techniques, and has similar systematic uncertainties. They have also performed consistency checks by using the b-tagging probability function to vary the signal to background ratio and also using events that have at least two b-tagged jets.
