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Published: 1999
Total Pages: 14
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DOWNLOAD EBOOKThis paper presents measurements of the mass of the W vector boson from the CDF and D0 experiments using data collected at (square root)s = 1.8 TeV during the 1994-1995 data taking run. CDF finds a preliminary mass of M{sub W} = 80.43 " 0.16 GeV and D0 measures a mass of M{sub W} = 80.44 " 0.12 GeV.
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Published: 2008
Total Pages: 10
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Published: 2001
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DOWNLOAD EBOOKPresented are measurements of the W boson mass from the D0 and CDF collaborations at the Tevatron from the 1994-1996 run. The W events are produced in p[anti p] collisions at[radical]s= 1.8 TeV. The W mass extracted from W[yields] e[nu] decays at D0 is determined to be 80.45[+-] 0.12 GeV; and from W[yields][mu][nu] decays at CDF is 80. 43[+-] 0.16 GeV. The world average W mass from the hadron collider measurements is 80.41[+-] 0.09 GeV.
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Published: 2010
Total Pages: 4
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DOWNLOAD EBOOKThe measurement of the mass of the W boson is one of the prime goals of the Tevatron experiments. In this contribution, a review is given of the most recent determinations of the W boson mass (m{sub W}) at the Tevatron. The combined Tevatron result, m{sub W} = 80.420 ± 0.031 GeV, is now more precise than the combined LEP result, leading to a world average value of m{sub W} = 80.399 ± 0.023 GeV.
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Published: 2007
Total Pages: 7
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DOWNLOAD EBOOKWe present a measurement of the W boson mass using 200 pb−1 of data collected in p{bar p} collisions at √s = 1.96 TeV by the CDF II detector at Run II of the Fermilab Tevatron. With a sample of 63964 W → ev candidates and 51128 W W → [mu]v candidates, we measure M{sub W} = (80413 ± 34{sub stat} ±34{sub syst} = 80413 ± 48) MeV/c2. This is the most precise single measurement of the W boson mass to date.
Author: Michelle Brochmann
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Published: 2017
Total Pages: 204
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DOWNLOAD EBOOKThis thesis presents the results of an analysis of the 3.7 {fb}^{-1} of Tevatron proton-antiproton data collected with the DZero (D0) Detector at Fermilab during the ``RunIIb34'' period, with the goal of extracting an improved measurement of the $W$ boson mass, which is currently measured to a precision of approx 20,{MeV}. The measurement is performed on events with one W boson which decays to an electron and a neutrino. Using a template technique, the mass is measured from three distributions that are correlated with the W boson mass: the transverse electron momentum, p_T^e, the transverse W mass, m_T$ and the neutrino momentum, which appears as missing transverse energy, {E}_T. A test measurement using this technique is successfully performed on a mock dataset generated with a Monte Carlo simulation. In the data, we find unexpected azimuthally dependent inconsistencies between the early and late parts of the data taking period. Implications for the completion of the data measurement are discussed.
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Published: 2001
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DOWNLOAD EBOOKThe measurements of the mass of the W boson (M{sub W}) and of the top quark (M{sub t}) are important for three reasons: (i) these masses represent fundamental parameters of the Standard Model; (ii) they determine the coupling between the top quark and the Higgs boson, the coupling being proportional to M{sub t}2/M{sub W}2; and (iii) radiative corrections relate the masses of the W, top quark and the Higgs boson: an accurate measurement of M{sub W} and M{sub t} would provide a constraint on the Higgs mass (M{sub H}). We present here the measurements obtained by the CDF and D0 collaborations corresponding to the so-called Run I of data-taking (1992-95, (almost equal to) 100 pb−1 each) at the Tevatron (p{bar p} collisions, (square root)s = 1.8 TeV). In addition we report on the improvements expected for these measurements in the current run (so-called Run IIa) which, having just started (March 2001), is expected to collect about 2 fb−1 by the year 2004.
Author: Chris Hays
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Published: 2005
Total Pages: 4
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DOWNLOAD EBOOKThe W boson mass (m{sub w}) is a key parameter of the standard model (SM), constraining the mass of the unobserved Higgs boson. Using Tevatron p{bar p} collision data from 1992-1995, the CDF and D0 collaborations measured m{sub w} to {delta}m{sub w} = 59 MeV. The ongoing Tevatron Run 2 has produced a factor of 5 more collisions, promising a significant reduction in {delta}m{sub w}. CDF has analyzed the first {approx}200 pb{sup -1} of Run 2 data and determined its {delta}m{sub w} to be 76 MeV.
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Published: 1998
Total Pages: 16
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DOWNLOAD EBOOKThis paper presents measurements of the mass of the W vector boson from the CDF and D0 experiments using data collected at (square root)s = 1.8 TeV during the 1994- 1995 data taking run. CDF finds a preliminary mass of M{sub W} = 80.43 " 0.16 GeV and D0 measures a mass of M{sub W} = 80.44 " 0.12 GeV.
