Download or read book Measurement of the ZZ Production Cross Section Using the Full CDF II Data Set written by and published by . This book was released on 2014 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Standard Model ZZ Cross Section in the ZZ to ell ell ell ell Channel written by and published by . This book was released on 2011 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we study one of the last corners of the Standard Model to be thoroughly investigated in a hadron collider, the production of two simultaneous Z bosons. We analyze 6.1 fb-1 of data produced at Fermilab at a center-of-mass energy √s = 1.96 TeV and recorded by the CDF experiment. The predicted cross-section is 1.4 pb and we measured 2.18+0.64 -0.63 pb (stat) 0:30 (syst) using 14 observed events. This is the largest set of candidate events in this channel yet found and with our estimated signal in the sample of 9.54 events provides the smallest percentage uncertainty on the ZZ cross-section to date. We also use this large set of events to yield kinematic plots and measure ZZ properties that will be of use in probing for new physics in the future.
Download or read book Study of the ZZ Diboson Production at CDF II written by and published by . This book was released on 2013 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this Thesis is the production of a pair of massive Z vector bosons in the proton antiproton collisions at the Tevatron, at the center-of-mass energy √s = 1.96 TeV. We measure the ZZ production cross section in two different leptonic decay modes: into four charged leptons (e or [mu]) and into two charged leptons plus two neutrinos. The results are based on the whole dataset collected by the Collider Detector at Fermilab (CDF), corresponding to 9.7 fb-1 of data. The combination of the two cross section measurements gives (p$\bar{p}$→ZZ) = 1.38+0.28 -0.27 pb, and is the most precise ZZ cross section measurement at the Tevatron to date. We further investigate the four lepton final state searching for the production of the scalar Higgs particle in the decay H →ZZ(*) →lll'l'. No evidence of its production has been seen in the data, hence was set a 95% Confidence Level upper limit on its production cross section as a function of the Higgs particle mass, mH, in the range from 120 to 300 GeV/c2.
Download or read book A Measurement of the WZ and ZZ Production Cross Sections Using Leptonic Final States in 8 6 Fb 1 of p bar p Collisions written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the processes p{bar p} → WZ → l?ll− and p{bar p} → ZZ → l+l−?{bar {nu}}, where l = e or?. Using 8.6 fb−1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider, we measure the WZ production cross section to be 4.50{sub -0.66}{sup +0.63} pb which is consistent with, but slightly above a prediction of the standard model. The ZZ cross section is measured to be 1.64 ± 0.46 pb, in agreement with a prediction of the standard model. Combination with an earlier analysis of the ZZ → l+l−l+l− channel yields a ZZ cross section of 1.44{sub -0.34}{sup +0.35} pb.
Download or read book Measurement of the Inclusive W and Z Production Cross Sections in Pp Collisions at sqrt s written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A measurement of inclusive W and Z production cross sections in pp collisions at sqrt(s)=7 TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. The measured inclusive cross sections are sigma(pp-> WX) B(W-> l nu) = 10.30 +/- 0.02 (stat.) +/- 0.10 (syst.) +/- 0.10 (th.) +/- 0.41 (lumi.) nb and sigma(pp -> ZX) B(Z-> l+̂l-̂) = 0.974 +/- 0.007 (stat.) +/- 0.007 (syst.) +/- 0.018 (th.) +/- 0.039 (lumi.) nb, limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent cross section ratios are [sigma(pp->WX) B(W-> l nu)]/[sigma(pp-> ZX) B(Z->l+̂l-̂)] = 10.54 +/- 0.07 (stat.) +/- 0.08 (syst.) +/- 0.16 (th.) and [sigma(pp->W+̂X) B(W+̂ -> l+̂nu)] / [sigma(pp->W-̂ X) B(W-̂ -> l-̂ nu)] = 1.421 +/- 0.006 (stat.) +/- 0.014 (syst.) +/- 0.029 (th.). The measured values agree with next-to-next-to-leading order QCD cross section calculations based on recent parton distribution functions.
Download or read book W Z Production Cross Sections and Asymmetries at E CM written by Angela M. Bellavance and published by . This book was released on 2005 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 Laboratory (FNAL) Tevatron. Data set sizes range from 72 pb{sup -1} to 226 pb{sup -1}, and results range from published to preliminary. Results presented agree with the Standard Model and world averages within errors.
Download or read book Search for WZ ZZ Production in the Lepton s MET Jets Channel with the CDF Experiment at the Tevatron Collider written by and published by . This book was released on 2014 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we present a search for the WZ and ZZ production in a final state ("W+2 jets") with a leptonically-decaying W and two energetic jets. We use the full dataset (+"Ldt = 8:9 fb-1) recorded with the CDF detector at Fermilab. The challenge consists in extracting the small Z-hadronic peak from the large amount of background processes. Those processes also include the WW, whose hadronic peak cannot be distinguished from the Z peak, due to the poor calorimeter resolution. In the past such a signature was used to measure the diboson cross section, which is highly dominated by the WW cross section.
Download or read book Top Cross Section Measurement at CDF written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the latest measurements of the t{bar t} pair production cross section performed by the CDF Collaboration analyzing p{bar p} collisions at a center-of-mass energy of 1.96 TeV from Fermilab Tevatron, as presented at the XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects. In order to test Standard Model predictions, several analysis methods are explored and all the top decay channels are considered, to better constrain the properties of the top quark and to search for possible sources of new physics affecting the pair production mechanism. Experimental results using an integrated luminosity up to 5.1 fb−1 are presented.
Download or read book Top Production Cross Section from CDF written by Anyes Taffard and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent top physics results from the CDF at a center-of-mass energy of 1.96 TeV are presented. Measurements of the t{bar t} production cross section in all three decay channels, using a set of complementary experimental methods, are presented as well as results of a search for single top production.
Download or read book A measurement of the Z boson transverse momentum distribution and of the ZZ and WZ production cross sections using 7 3 8 6 fb 1 of pp collisions at s written by Mika Vesterinen and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Total W and Z boson Production Cross Sections in Pp Collisions at s written by Ksenia Gasnikova and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of W and Z Production Cross sections in P bar P Collisions at radical written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross sections for W and Z production in p[bar p] collisions at [radical]s = 1.8 TeV are measured using the D0 detector at the Fermilab Tevatron collider. The detected final states are W [yields] ev[sub e], Z [yields] e[sup +]e[sup [minus]], W [yields] [mu]v[sub [mu]], and Z [yields] [mu][sup +][mu][sup [minus]]. In the ratio of these measurements, many common sources of systematic error cancel and we measure R = [sigma], (p[bar p] [yields] W) [center-dot] Br(W [yields] lv)/ [sigma], (p[bar p] [yields] Z) [center-dot] Br(Z [yields] l[sup +]l[sup [minus]]). Assuming standard model couplings, this result is used to determine the width of the W bosom and to set a limit on the decay W[sup +] [yields] t[bar b].
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the ZZ Production Cross Section and Limits on Anomalous Triple Gauge Couplings at s written by Rachel Hinman and published by . This book was released on 2012 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A measurement of the Z Boson transverse momentum distribution and of the ZZ and WZ production cross sections using 7 3 8 6 fb 1 of p bar p Collisions at sqrt s written by Mika Vesterinen and published by . This book was released on 2011 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Inclusive W and Z Boson Production Cross Sections in Pp Collisions at sqrt s written by and published by . This book was released on 2014 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
