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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We present recent results on measurements of the transverse momentum distribution of W and Z bosons, the angular distribution of electrons from W decays, and on color coherence effects in W+jets events from p{bar p} collisions at (square root)s = 1.8 TeV at the Fermilab Tevatron Collider. The data are compared to perturbative QCD calculations.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We present recent results on measurements of the transverse momentum distribution of W and Z bosons, the angular distribution of electrons from W decays, and on color coherence effects in W+jets events from p{bar p} collisions at (square root)s = 1.8 TeV at the Fermilab Tevatron Collider. The data are compared to perturbative QCD calculations.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The CDF and D0 collaborations have used recent data taken at the Tevatron to perform QCD tests with W and Z bosons decaying leptonically. D0 measures the production cross section times branching ratio for W and Z bosons. This also gives an indirect measurement of the total width of the W boson: [Lambda][sub W] = 2.126 [+-] 0.092 GeV. CDF reports on a direct measurement of [Lambda][sub W] = 2.19 [+-] 0.19 GeV, in good agreement with the indirect determination and Standard Model predictions. D0's measurement of the differential d[sigma]/dp[sub T] distribution for W and Z bosons decaying to electrons agrees with the combined QCD perturbative and resummation calculations. In addition, the d[sigma]/dp[sub T] distribution for the Z boson discriminates between different vector boson production models. Studies of W + Jet production at CDF find the NLO QCD prediction for the production rate of W + [ge] 1 Jet events to be in good agreement with the data.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The CDF and D0 collaborations have used recent data taken at the Tevatron to perform QCD tests with W and Z bosons decaying leptonically. D0 measures the production cross section times branching ratio for W and Z bosons and determines the branching ratio B(W[yields] l[nu])= (10.43[+-] 0.44)% (l= e, [mu]). This also gives an indirect measurement of the total width of the W boson:[Gamma][sub W]= 2.16[+-] 0.09 GeV. The W cross section times branching ratio into tau leptons is measured to be[sigma]([anti p]p[yields] W+ X)B(W[yields][tau][nu])= 2.38[+-]0.13 nb, from which the ratio of the coupling constants is determined: g[sub[tau]][sup W]/g[sub e][sup W]= 1.004[+-] 0.019[+-] 0.026. D0's measurement of the differential d[sigma]/dP[sub T] distribution for the Z boson decaying to electrons, discriminates between different phenomenologic vector boson production models. CDF measures the cross section for the Drell-Yan continuum, and extracts improved limits on compositeness scales for quarks and leptons of[Lambda][sub ql][approximately] 3 - 6 TeV, depending on the model. Studies of W+ Jet production at CDF and D0 find that the QCD prediction underestimates the production rate of W+ 1 Jet events by about a factor of 2 as measured by both collaborations.
Author: Michiel P. Sanders Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
In this paper, recent experimental results on W and Z boson production at the Tevatron are described. These results not only provide tests of the standard model, but are also sensitive to proton parton distribution functions.
Author: Roberto Tenchini Publisher: World Scientific ISBN: 9812779906 Category : Science Languages : en Pages : 436
Book Description
For the first time, this invaluable book shows how cardiac perfusion and pumping can be quantified and correlated. Self-contained and unified in presentation, the explanations in the compendium are detailed enough to capture the reader's curiosity and complete enough to provide the background material to explore further into the subject. Mathematically rigorous and clinically oriented, the book is a major resource for cardiologists, cardiac surgeons and clinicians. For students, it is an ideal textbook for senior-level courses in cardiovascular engineering.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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.
Author: Mika Vesterinen Publisher: Springer Science & Business Media ISBN: 3642307884 Category : Science Languages : en Pages : 226
Book Description
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.
Author: A. Astbury Publisher: World Scientific ISBN: 9810244371 Category : Science Languages : en Pages : 441
Book Description
The Lake Louise Winter Institute is held annually to explore recent trends in physics in an informal setting. Pedagogical and review lectures are presented by invited experts. A topical workshop is held in conjunction with the Institute, with contributed presentations by participants. It concentrates on areas related to the invited lectures. Participants are encouraged to present material that includes recent developments in experimental and theoretical physics.
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Author: Michiel P. Sanders
Author: Roberto Tenchini
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Author: Sandra Leone
Author: Mika Vesterinen
Author: A. Astbury