A Preliminary Measurement of the W Boson Mass Using W 2!e[nu] Decays at
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| Total Pages | : 13 |
| Release | : 1996 |
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A Preliminary Measurement of the W Boson Mass Using W[yields] E[nu] Decays at
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| Release | : 2001 |
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Download A Preliminary Measurement of the W Boson Mass Using W[yields] E[nu] Decays at Book in PDF, ePub and Kindle
The preliminary measurement of the W boson mass from[ital e][nu] decays produced in[ital p][ital[anti p]] collisions at[radical]s= 1.8 TeV using the D[null] detector for the 1994-1995 Fermilab run is presented. The analysis uses events with electrons in the central region ([vert-bar][eta][vert-bar][lt] 1.2). From a sample of 32,856[ital W] decay and 1562 dielectron events we measure the[ital W] mass to be 80.38[+-] 0.07(stat.)[+-]0.13(syst.)[+-]0.13 (scale) GeV/c[sup 2]. The technique for determining the mass and its systematic errors is discussed.
Measurement of the W Boson Mass
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| Release | : 2001 |
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We present a preliminary measurement of the[ital W] boson mass using data collected by the D[null] experiment at the Fermilab Tevatron during the 1994-1995 collider run 1b. We use[ital W][r-arrow][ital e][nu] decays to extract the[ital W] mass from the observed spectrum of transverse mass of the electron ([vert-bar][eta][vert-bar][lt] 1. 2) and the inferred neutrino We use[ital Z][sup 0][r-arrow][ital ee] decays to constrain our model of the detector response. We measure[ital m][sub W]/[ital m][sub Z]= 0.8815[+-] 0.0011([ital stat])[+-] 0.0014([ital syst]) and[ital m][sub W]= 80.38[+-] 0.07 ([ital W stat])[+-] 0.13([ital syst]) GeV. Combining this result with our previous measurement from the 1992-1993 data, we obtain[ital m][sub W]= 80.37[+-] 0.15 GeV (errors combined in quadrature).
A Measurement of the Mass of the W Vector Boson at CDF.
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| Total Pages | : 7 |
| Release | : 1994 |
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Download A Measurement of the Mass of the W Vector Boson at CDF. Book in PDF, ePub and Kindle
We present a preliminary measurement of the mass of the W vector boson using the decays W → ev and W →?v. The mass of the W is an important parameter of the standard model. Through its relation to both the top quark and the higgs sector, it provides a sensitive probe of the electroweak theory. During the last run of Fermilabs̀ Tevatron, CDF recorded {bar p}p collisions at √s = 1.8 TeV corresponding to an integrated luminosity of 19.3 pb−1. An analysis of both decay channels yields a combined mass measurement of Mw = 80.38 ± 0.23 GeV/c.
Measurement of the W Boson Mass with the ALEPH Detector
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| Release | : 2002 |
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The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing four-momentum conservation is then applied to improve the invariant mass resolution. The W boson mass is obtained from the invariant mass spectrum by a Monte Carlo reweighting method. Since the statistical and systematical uncertainties are at the same level, the latter are investigated in great detail. The presented W boson mass is then included in a preliminary world average which is used to extract a upper limit on the Higgs boson mass.
The Measurement of the W Boson Mass from CDF.
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| Release | : 2005 |
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Recent results from LEP experiments have substantially improved the knowledge of the Z boson. However, hadron colliders remain the only source of direct measurements of the W boson. There have been measurements of the W boson mass from the UA2 and CDF collaborations. The W mass continues to be a subject of great interest in testing the Standard Model. Here, the authors have made a preliminary determination of the W boson mass M[sub W] = 80.38 [+-] 0.23 GeV/c[sup 2] from a combined analysis of W [yields] e[nu] and W [yields] [mu][nu] in [anti p]p collisions at [radical]s = 1.8 TeV. The electron data alone yields M[sub W] = 80.47 [+-] 0.15(stat.) [+-] 0.25(syst.) GeV/c[sup 2], while the muon data gives M[sub W] = 80.29 [+-] 0.20(stat.) [+-] 0.24(syst.) GeV/c[sup 2].
Measurement of the W Boson Mass with the D0 Run II Detector Using the Electron P(T) Spectrum
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| Total Pages | : 179 |
| Release | : 2008 |
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This thesis is a description of the measurement of the W boson mass using the D0 Run II detector with 770 pb−1 of p{bar p} collision data. These collisions were produced by the Tevatron at √s = 1.96 TeV between 2002 and 2006. We use a sample of W → e[nu] and Z → ee decays to determine the W boson mass with the transverse momentum distribution of the electron and the transverse mass distribution of the boson. We measure M{sub W} = XXXXX ± 37 (stat.) ± 26 (sys. theo.) ± 51 (sys. exp.) MeV = XXXXX ± 68 MeV with the transverse momentum distribution of the electron and M{sub W} = XXXXX ± 28 (stat.) ± 17 (sys. theo.) ± 51 (sys. exp.) MeV = XXXXX ± 61 MeV with the transverse mass distribution.
The Measurement of the Mass of the W Boson from the Tevatron
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| Total Pages | : 14 |
| Release | : 1999 |
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This 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.
Measurement of M[sub W] Using the Transverse Mass Ratio of W and Z.
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| Release | : 2001 |
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We report on the measurement of[ital W] boson mass from a direct determination of the ratio of the transverse masses of[ital W] and[ital Z] using the D[null] detector at the Fermilab Tevatron[ital p][ital[anti p]] collider operating at[radical]s= 1.8 TeV. The analysis is a preliminary result based on a partial data sample of 13[ital pb][sup -1] using[ital W][r-arrow][ital e][nu] and[ital Z][r-arrow][ital ee] decays.
The Measuremnt of the Mass of the W Boson from the Tevatron
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| Total Pages | : 16 |
| Release | : 1998 |
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This 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.
