Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Evidence For Wz Production And A Measurement Of The Wz Production Cross Section full books in PDF, epub, and Kindle. Read online Evidence For Wz Production And A Measurement Of The Wz Production Cross Section ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : James D. Degenhardt
Publisher :
ISBN 13 :
Total Pages : 370 pages
Book Rating : 4.3/5 (91 download)
Download or read book Evidence for WZ Production and a Measurement of the WZ Production Cross Section written by James D. Degenhardt and published by . This book was released on 2007 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 181 pages
Book Rating : 4.:/5 (873 download)
Download or read book Evidence for WZ Production and a Measurement of the WZ Production Cross Section written by and published by . This book was released on 2007 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes a test of the Standard Model (SM) of particle physics by measuring the probability, or cross section, of simultaneously producing a W boson and a Z boson from proton-antiproton collisions. The SM predicts the cross section of WZ production to be 3.68 ± 0.25 pb. The SM and physics of WZ production are described in Chapter 2 of this dissertation. The 1.96 TeV center-of-mass energy proton-antiproton collisions are provided by the Fermi National Accelerator Laboratory (FNAL) Tevatron Collider. The W and Z particles are detected using the D0 detector, which is described in Chapter 3. The data were collected by the detector during 2002-2006 corresponding to 1 fb−1 of p{bar p} collisions. This data set is described in Chapter 6. The measurement uses the trilepton (e[nu]ee, [mu][nu]ee, e[nu][mu][mu], and [mu][nu][mu][mu]) decay channels, in which a W decays to a charged lepton plus a neutrino and a Z decays to a pair of charged leptons. The W and Z particle selection criteria, detection efficiency, and background determination are described in Chapter 7. We observe 13 candidate events in 1 fb−1 of p{bar p} collisions. In this data set we expect to see 4.5 ± 0.6 background events, and we expect to see 9.2 ± 1.0 signal events. The probability of 4.5 ± 0.6 background events to fluctuate to 13 or more events is 1.2 x 10−3 which is a 3.0 [sigma] deviation from the background estimate. A log likelihood method is used to determine the most likely cross section as determined by the measured signal efficiencies, the expected backgrounds, and the observed data. Presented in Chapter 8 is a measurement of the cross section for p{bar p} → WZ + X at √s = 1.96 TeV. The WZ diboson production cross section is measured to be [sigma]{sub WZ} = 2.7{sub -1.3}{sup +1.7} pb. This is in agreement with the predicted Standard Model cross section.
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.
Author : Martina Hurwitz
Publisher :
ISBN 13 : 9781109689815
Total Pages : 122 pages
Book Rating : 4.6/5 (898 download)
Download or read book Measurement of the WW + WZ Production Cross Section in a Semileptonic Decay Mode at CDF. written by Martina Hurwitz and published by . This book was released on 2010 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of the WW + WZ production cross section in a semileptonic decay mode is presented. The measurement is carried out with 4.6 fb-1 of integrated luminosity collected by the CDF II detector in s = 1.96 TeV proton-antiproton collisions at the Tevatron. The main experimental challenge is identifying the signal in the overwhelming background from W +jets production. The modeling of the W +jets background is carefully studied and a matrix element technique is used to build a discriminant to separate signal and background. The cross section of WW + WZ production is measured to be sigma( pp ̄ → WW + WZ) = 16.5+3.3-3.0 pb, in agreement with the next-to-leading order theoretical prediction of 15.1 +/- 0.9 pb. The significance of the signal is evaluated to be 5.4sigma. This measurement is an important milestone in the search for the Standard Model Higgs boson at the Tevatron.
Download or read book Measurement of WW and WZ Production in the Lepton Plus Heavy Flavor Jets Final State at CDF. written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the CDF measurement of the diboson WW and WZ production cross section in a final state consistent with leptonic W decay and jets originating from heavy flavor quarks, based on the full Tevatron Run II dataset. The analysis of the di-jet invariant mass spectrum allows the observation of 3.7 sigma evidence for the combined production processes of either WW or WZ bosons. The different heavy flavor decay pattern of the W and Z bosons and the analysis of the secondary-decay vertex properties allow to independently measure the WW and WZ production cross section in a hadronic final state. The measured cross sections are consistent with the standard model predictions and correspond to signal significances of 2.9 and 2.1 sigma for WW and WZ production, respectively.
Author : Fabian M. Spettel
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Measurement of the Boosted WW+WZ Production Cross Section in the Semileptonic Decay Channel with ATLAS written by Fabian M. Spettel and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mika Vesterinen
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
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 pp̄ 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:
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (727 download)
Download or read book WW and WZ Production at the Tevatron written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes recent measurements of the production properties of WW and WZ pairs of bosons at the Tevatron. This includes measurements of the cross-section and triple gauge couplings in the WW process and the first evidence for WZ production.
Author :
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (873 download)
Download or read book First Evidence for WW and WZ Diboson Production with Semi-leptonic Decays at a Hadron Collider written by and published by . This book was released on 2009 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented is a measurement of the simultaneous production of a W{sup ±} boson in association with a second weak boson (W{sup ±} or Z°) in p{bar p} collisions at √s = 1.96 TeV. Events are consider with one electron or one muon, missing transverse energy, and at least two hadronic jets. The data were collected by the D0 detector in Run IIa of the Tevatron accelerator and correspond to 1.07 fb−1 of integrated luminosity for each of the two channels (WW/WZ → e[nu]q{bar q} and WW/WZ → [mu][nu]q{bar q}). The cross section for WW + WZ production is measured to be 20.2 ± 2.5(stat) {+-} 3.6(sys) {+-} 1.2(lum) pb with a Gaussian significance of 4.4 standard deviations above the background-only scenario. This measurement is consistent with the Standard Model prediction and represents the first direct evidence for WW and WZ production with semi-leptonic decays at a hadron collider.
Author : Mika Vesterinen
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.:/5 (96 download)
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:
Author : Ketino Kaadze
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (642 download)
Download or read book Study of WZ Production with the D0 Detector written by Ketino Kaadze and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Dissertation I present a detailed study of ppbar->WZ production using fully leptonic decays of W and Z bosons with electrons and muons in the final state. Data used for the study were collected by the D0 detector at the Fermilab proton-antiproton collider with a center-of-mass energy of 1.96 TeV and correspond to 4.1 fb[surepscript]-1 of integrated luminosity. The most precise measurement of the WZ production cross section is obtained and found to be in a good agreement with the standard model prediction. I also present a search for new phenomena in the WZ production by investigating the coupling between W and Z bosons and by searching for new charged particles that can decay into WZ boson pair. No evidence for new physics is found, and the most stringent limits are set on the anomalous WWZ coupling parameters and masses of charged resonances. This result also sets the stringest limit on one of the possible sources of electroweak symmetry breaking, a low-scale Technicolor with a typical heavy techni-pion hypothesis.
Author :
Publisher :
ISBN 13 :
Total Pages : 211 pages
Book Rating : 4.:/5 (951 download)
Download or read book Measurement of $WZ$ Production and Searches for Anomalous Top Quark Decays and Higgs Boson Production Using Tri-lepton Final States in $p\bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2012 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of three analyses; a $WZ$ production cross section measurement, a search for new physics in anomalous top quark decays, and the search for the standard model Higgs boson, all with final states of three or more leptons -- either electrons or muons -- plus an imbalance of transverse momentum using Tevatron proton and anti-proton collisions at a center--of--mass energy of $\sqrt{s}$ = 1.96 TeV with the D0 detector at the Fermi National Accelerator Laboratory in Chicago, IL. The first analysis reports a measurement of the $WZ \rightarrow \ell^{\prime}\nu\ell\bar{\ell}$ cross section. Using 4.1 $fb^{-1}$ of integrated luminosity, we measure a cross section of 3.90$_{-0.85}^{+1.01}$($stat+syst$) $\pm$ 0.31($lumi$) pb, which is found to be in good agreement with the standard model prediction. The second analysis is an extension of the first, in which we use the same dataset and look for the flavor changing neutral current decay of $t \rightarrow Zq$ in $p\bar {p} \rightarrow t\bar{t} \rightarrow WbZq \rightarrow \ell^{\prime}\nu\ell\bar{\ell} + \rm{jets}$ decays. Here $q$ is considered to be either a $u$ or $c$ quark, and both the $q$ and $b$ quarks decay hadronically. We find no evidence of flavor changing neutral current production and set upper limits on the branching ratio of $BR(t \rightarrow Zq)
Author : Nicklas C. Denis
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book Measurement of the WZ Cross Section in the Channel WZ→lvbb̄ at √s written by Nicklas C. Denis and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (727 download)
Download or read book Study of $WZ$ Production with the D0 Detector written by and published by . This book was released on 2010 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Dissertation I present a detailed study of p{bar p} --> WZ production using fully leptonic decays of W and Z bosons with electrons and muons in the final state. Data used for the study were collected by the D0 detector at the Fermilab p{bar p} collider with a center-of-mass energy of (square root)s = 1.96 TeV and correspond to 4.1 fb−1 of integrated luminosity. The most precise measurement of the WZ production cross section is obtained and found to be in a good agreement with the standard model prediction. I also present a search for new phenomena in the WZ production by investigating the coupling between W and Z bosons and by searching for new charged particles that can decay into WZ boson pair. No evidence for new physics is found, and the most stringent limits are set on the anomalous WWZ coupling parameters and masses of charged resonances. This result also sets the stringest limit on one of the possible sources of electroweak symmetry breaking, a low-scale Technicolor with a typical heavy techni-pion hypothesis.
Author : Herwig Schopper
Publisher : World Scientific
ISBN 13 : 9814644161
Total Pages : 452 pages
Book Rating : 4.8/5 (146 download)
Download or read book 60 Years Of Cern Experiments And Discoveries written by Herwig Schopper and published by World Scientific. This book was released on 2015-07-13 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a compilation of the most important experimental results achieved during the past 60 years at CERN - from the mid-1950s to the latest discovery of the Higgs particle. Covering the results from the early accelerators at CERN to those most recent at the LHC, the contents provide an excellent review of the achievements of this outstanding laboratory. Not only presented is the impressive scientific progress achieved during the past six decades, but also demonstrated is the special way in which successful international collaboration exists at CERN.
Author :
Publisher : World Scientific
ISBN 13 : 981447651X
Total Pages : 81 pages
Book Rating : 4.8/5 (144 download)
Download or read book High Energy Physics written by and published by World Scientific. This book was released on 1981 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Felix Bührer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Measurements of the Inclusive W→eν and the Combined WW+WZ→lνqq' Production Cross Sections with the ATLAS Detector written by Felix Bührer and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
