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| Author | : B. Abbott |
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| Total Pages | : 152 |
| Release | : 1997 |
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| Total Pages | : 7 |
| Release | : 2007 |
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We 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.
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| Total Pages | : 9 |
| Release | : 2009 |
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I present the first measurement of the W boson mass in the electron decay channel using the Run II D0 detector at the Fermilab Tevatron Collider. The data used was collected from 2002 to 2006 and the integrated luminosity is 1 fb−1. The W boson mass was determined from the likelihood fit to the measured data distribution. The mass value is found to be 80.401 ± 0.023(stat) ± 0.037(syst) GeV = 80.401 ± 0.044 GeV using the transverse mass spectrum, which is the most precise measurement from one single experiment to date. This result puts tighter constraints on the mass of the standard model Higgs boson. I also present three other measurements that can help to reduce the theoretical uncertainties for the future W mass measurements.
| Author | : Michelle Brochmann |
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| Total Pages | : 204 |
| Release | : 2017 |
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This 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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| Total Pages | : 7 |
| Release | : 2009 |
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The authors present a measurement of the W boson mass in W → e[nu] decays using 1 fb−1 of data collected with the D0 detector during Run II of the Fermilab Tevatron collider. With a sample of 499830 W → e[nu] candidate events, they measure M{sub W} = 80.401 ± 0.043 GeV. This is the most precise measurement from a single experiment.
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| Release | : 1999 |
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We present a new measurement of the W mass using the W 2!e[nu] data from the D0 forward detectors at the Fermilab Tevatron p{anti p} Collider. This is the first measurement of the W mass with electron candidates in the range 1.5>
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| Total Pages | : 10 |
| Release | : 2008 |
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| Release | : 2014 |
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We give a detailed description of the measurement of the $W$ boson mass, $M_W$, performed on an integrated luminosity of 4.3 fb$^{-1}$, which is based on similar techniques as used for our previous measurement done on an independent data set of 1 fb$^{-1}$ of data. The data were collected using the D0 detector at the Fermilab Tevatron Collider. This data set yields $1.68\times 10^6$ $W\rightarrow e\nu$ candidate events. We measure the mass using the transverse mass, electron transverse momentum, and missing transverse energy distributions. The $M_W$ measurements using the transverse mass and the electron transverse momentum distributions are the most precise of these three and are combined to give $M_W$ = 80.367 $\pm$ 0.013 (stat) $\pm$ 0.022 (syst) GeV = 80.367 $\pm$ 0.026 GeV. When combined with our earlier measurement on 1 fb$^{-1}$ of data, we obtain $M_W$ = 80.375 $\pm$ 0.023 GeV.
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| Total Pages | : 4 |
| Release | : 2012 |
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We have measured the W-boson mass M{sub W} using data corresponding to 2.2 fb−1 of integrated luminosity collected in p{bar p} collisions at √s = 1.96 TeV with the CDF II detector at the Fermilab Tevatron collider. Samples consisting of 470 126 W → e? candidates and 624 708 W →?? candidates yield the measurement M{sub W} = 80 387 ± 12{sub stat} ± 15{sub syst} = 80 387 ± 19 MeV/c2. This is the most precise measurement of the W-boson mass to date and significantly exceeds the precision of all previous measurements combined.
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