Study of WZ Production with the D0 Detector

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Book Synopsis Study of WZ Production with the D0 Detector by : Ketino Kaadze

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.

Study of $WZ$ Production with the D0 Detector

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ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Study of $WZ$ Production with the D0 Detector by :

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.

Search for WZ Production in the Trilepton Channel at the Tevatron and Limits on the WWZ Vertex Anomalous Couplings

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ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (971 download)

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Book Synopsis Search for WZ Production in the Trilepton Channel at the Tevatron and Limits on the WWZ Vertex Anomalous Couplings by :

Download or read book Search for WZ Production in the Trilepton Channel at the Tevatron and Limits on the WWZ Vertex Anomalous Couplings written by and published by . This book was released on 1998 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for WZ production through the study of the reaction p $\bar{p}$→ l $bar{v}$ee+X (l = e, [mu]) at √s = 1.8 TeV using the D0 detector at Fermilab is presented.

Evidence for WZ Production and a Measurement of the WZ Production Cross Section

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Publisher :
ISBN 13 :
Total Pages : 370 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Evidence for WZ Production and a Measurement of the WZ Production Cross Section by : James D. Degenhardt

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:

First Evidence for WW and WZ Diboson Production with Semi-leptonic Decays at a Hadron Collider

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ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis First Evidence for WW and WZ Diboson Production with Semi-leptonic Decays at a Hadron Collider by :

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.

Z Boson Transverse Momentum Distribution, and ZZ and WZ Production

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Publisher : Springer Science & Business Media
ISBN 13 : 3642307884
Total Pages : 226 pages
Book Rating : 4.6/5 (423 download)

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Book Synopsis Z Boson Transverse Momentum Distribution, and ZZ and WZ Production by : Mika Vesterinen

Download or read book Z Boson Transverse Momentum Distribution, and ZZ and WZ Production written by Mika Vesterinen and published by Springer Science & Business Media. This book was released on 2012-06-30 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work develops novel data analysis techniques enabling aspects of the Standard Model of particle physics to be tested with unprecedented precision using data from the DZero experiment at the high energy “Tevatron” proton-antiproton collider at Fermilab, Chicago. Vesterinen's measurements of the transverse momentum of Z bosons using the novel variable φ* have exposed deficiencies in the current state-of-the-art theoretical predictions for vector boson production at hadron colliders. These techniques are now being used in the experiments at CERN’s Large Hadron Collider (LHC) and have stimulated considerable interest in the theoretical particle physics community. Furthermore, Vesterinen's measurements of the cross sections for the production of pairs of vector bosons (WZ and ZZ) are to date the most precise ever made.

Search for Anomalous Couplings in WW and WZ Measurements at the Tevatron (D0 and CDF Results).

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (683 download)

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Book Synopsis Search for Anomalous Couplings in WW and WZ Measurements at the Tevatron (D0 and CDF Results). by :

Download or read book Search for Anomalous Couplings in WW and WZ Measurements at the Tevatron (D0 and CDF Results). written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for WW and WZ production in p[anti p] collisions at[radical]s= 1.8 TeV using the CDF and D0 detectors is presented. Three analyses, one concentrating on the leptons+ jets decay channels and two concentrating on the dilepton decay channels are described in detail. Limits on anomalous WW[gamma] and WWZ trilinear gauge boson couplings are presented. Prospects for further study of diboson production and anomalous couplings with the Upgraded Tevatron are also presented.

Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes)

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Publisher : World Scientific
ISBN 13 : 9814547107
Total Pages : 1878 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes) by : Zygmunt Ajduk

Download or read book Proceedings Of The 28th International Conference On High Energy Physics (In 2 Volumes) written by Zygmunt Ajduk and published by World Scientific. This book was released on 1997-04-11 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 28th conference from the Rochester series was the major high energy physics conference in 1996. Volume one contains short reports on new theoretical and experimental results. Volume two consists of the review talks presented in the plenary sessions.

Theoretical Implications of the W-Z Mass Difference and the Capabilities of the D0 Detector in Measuring it

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Theoretical Implications of the W-Z Mass Difference and the Capabilities of the D0 Detector in Measuring it by :

Download or read book Theoretical Implications of the W-Z Mass Difference and the Capabilities of the D0 Detector in Measuring it written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We examine the phenomenology of the W-Z mass difference as a function of the top quark mass and the Higgs mass. A detailed analysis is presented on how well the mass difference is measurable using the D0 detector at Fermilab. We show that the effective mass distribution of the Z° is not a Breit-Wigner at the Tevatron and present techniques developed for the D0 detector simulation that can be used to reduce the systematic errors in measuring the W-Z mass difference. Scenarios are presented for the integrated luminosities of 10 pb−1 and 100 pb−1 at the Tevatron. It is shown that the Tevatron is competitive with LEP II for integrated luminosities of 100 pb−1 in attainable precisions in this measurement. These considerations argue strongly for the pp option in the Tevatron upgrade program. 17 refs., 14 figs., 2 tabs.

Energy Research Abstracts

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ISBN 13 :
Total Pages : 508 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-12 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Anomalous WW/WZ 2!e[nu]jj Production at D0; Busqueda de Produccion Anomala WW/WZ 2![nu]jj en D-Zero

Download Search for Anomalous WW/WZ 2!e[nu]jj Production at D0; Busqueda de Produccion Anomala WW/WZ 2![nu]jj en D-Zero PDF Online Free

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ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Search for Anomalous WW/WZ 2!e[nu]jj Production at D0; Busqueda de Produccion Anomala WW/WZ 2![nu]jj en D-Zero by :

Download or read book Search for Anomalous WW/WZ 2!e[nu]jj Production at D0; Busqueda de Produccion Anomala WW/WZ 2![nu]jj en D-Zero written by and published by . This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for anomalous WW and WZ production in p{anti p} collisions at √s = 1.8 TeV using the D0 detector at Fermilab is presented. With a data sample of p{anti p} → e[nu]jjX events corresponding to an integrated luminosity of 76.5 ± 4.1pb−1. 399 candidate events were identified, from which 387.1 ± 39.8 events were estimated to be background. No deviations from the Standard Model were seen, which predicts 16.2 ± 2.7 events. The 95% CL limit on the cross section [sigma](p{anti p} → W+W−X) was calculated to be 93.8 pb. Limits on the CP-conserving anomalous WW{sub {gamma}} and WWZ coupling parameters were obtained from a binned likelihood fit to the transverse momentum spectrum of the W boson. Assuming that the WW{sub {gamma}} and WWZ coupling parameters are equal, the 95% CL limits on the CP-conserving couplings are -0.56

Production of W and Z Bosons at

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (685 download)

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Book Synopsis Production of W and Z Bosons at by :

Download or read book Production of W and Z Bosons at written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results from the DO experiment are presented on production properties of the W[sup [plus-minus]] and Z[sup 0] gauge bosons using final states containing electrons and muons. The DO detector has accumulated 16.7 pb[sup [minus]1] of data at the Fermilab [bar p]p Tevatron collider. Based on a subset of this data preliminary measurements of the W[sup [plus-minus]] and Z[sup 0] production cross section and a measurement of [alpha][sub s] at Q[sup 2] = M[sub W][sup 2] derived from the ratio of W + 1jet to W + 0jets is presented.

WW and WZ Production at the Tevatron

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (683 download)

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Book Synopsis WW and WZ Production at the Tevatron by :

Download or read book WW and WZ Production at the Tevatron written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct limits are set on WWZ and WW[gamma] three-boson couplings in a search for WW and WZ production in p[bar p] collisions at[radical]s= 1.8 TeV using the D(0) and CDF detectors at the Fermilab Tevatron.

Radiative Corrections: Status And Outlook - Proceedings Of The Tennessee International Symposium

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Publisher : World Scientific
ISBN 13 : 9814550817
Total Pages : 538 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis Radiative Corrections: Status And Outlook - Proceedings Of The Tennessee International Symposium by : Bennie F L Ward

Download or read book Radiative Corrections: Status And Outlook - Proceedings Of The Tennessee International Symposium written by Bennie F L Ward and published by World Scientific. This book was released on 1995-05-31 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art and the outlook for the theoretical and experimental aspects of radiative corrections to the SU2L x U₁ x SUc₃3 Standard Model (SM) of elementary particle physics. Particular emphasis is given to SM tests in high precision Z° physics and high energy hadron collider physics.

Measurement of the WW + WZ Production Cross Section in a Semileptonic Decay Mode at CDF.

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ISBN 13 : 9781109689815
Total Pages : 122 pages
Book Rating : 4.6/5 (898 download)

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Book Synopsis Measurement of the WW + WZ Production Cross Section in a Semileptonic Decay Mode at CDF. by : Martina Hurwitz

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.

Diboson Physics at the Tevatron

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Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (316 download)

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Book Synopsis Diboson Physics at the Tevatron by : Mark S. Neubauer

Download or read book Diboson Physics at the Tevatron written by Mark S. Neubauer and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the Fermilab Tevatron, the CDF and D0 detectors are being used to study diboson production in p{bar p} collisions at {radical}s = 1.96 TeV. The authors summarize recent measurements of the W{gamma}, Z{gamma}, and WW cross-sections and limits on WZ and ZZ production. Limits on anomalous trilinear gauge couplings are also presented.

Search for Anomalous WW/WZ {r_arrow} E{nu}jj Production at D0; Busqueda de Produccion Anomala WW/WZ {r_arrow}e{nu}jj en D-Zero

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Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Search for Anomalous WW/WZ {r_arrow} E{nu}jj Production at D0; Busqueda de Produccion Anomala WW/WZ {r_arrow}e{nu}jj en D-Zero by :

Download or read book Search for Anomalous WW/WZ {r_arrow} E{nu}jj Production at D0; Busqueda de Produccion Anomala WW/WZ {r_arrow}e{nu}jj en D-Zero written by and published by . This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for anomalous WW and WZ production in p{anti p} collisions at √s = 1.8 TeV using the D0 detector at Fermilab is presented. With a data sample of p{anti p} → e?jjX events corresponding to an integrated luminosity of 76.5 ± 4.1pb{sup −1}. 399 candidate events were identified, from which 387.1 ± 39.8 events were estimated to be background. No deviations from the Standard Model were seen, which predicts 16.2 ± 2.7 events. The 95% CL limit on the cross section?(p{anti p} → WW{sup −}X) was calculated to be 93.8 pb. Limits on the CP-conserving anomalous WW{sub?} and WWZ coupling parameters were obtained from a binned likelihood fit to the transverse momentum spectrum of the W boson. Assuming that the WW{sub?} and WWZ coupling parameters are equal, the 95% CL limits on the CP-conserving couplings are −0.56