Electroweak corrections uncertainty on the W mass measurement at LEP

Cossutti, F.

doi:10.1140/epjc/s2005-02378-6

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…Studies have shown [39] that the theoretical implementation of these corrections in RacoonWW [40] are in good agreement with YFSWW3. The following two possible contributions to the uncertainties in these corrections using YFSWW3 are considered.…”

Section: Next-to-leading O(α) Correctionsmentioning

confidence: 76%

Measurement of the W boson mass and width in e+e- collisions at LEP

et al. 2006

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The mass of the W boson is determined from the direct reconstruction of W decays in WW → qqqq and WW → ℓνqq events in e + e − collisions at LEP. The data sample corresponds to an integrated luminosity of 683 pb −1 collected with the ALEPH detector at centre-of-mass energies up to 209 GeV. To minimise any effect from colour reconnection a new procedure is adopted in which low energy particles are not considered in the mass determination from the qqqq channel. The combined result from all channels is m W = 80.440 ± 0.043(stat.) ± 0.024(syst.) ± 0.009(FSI) ± 0.009(LEP) GeV/c 2 ,where FSI represents the possible effects of final state interactions in the qqqq channel and LEP indicates the uncertainty in the beam energy. From twoparameter fits to the W mass and width, the W width is found to be Γ W = 2.14 ± 0.09(stat.) ± 0.04(syst.) ± 0.05(FSI) ± 0.01(LEP) GeV.To be published in Eur. Phys. J. C---------------

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Section: Next-to-leading O(α) Correctionsmentioning

confidence: 76%

Measurement of the W boson mass and width in e+e- collisions at LEP

et al. 2006

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“…Higher-order leading-log FSR corrections are included using PHOTOS for leptons and PYTHIA for quarks. ISR effects on m W are estimated by comparing the O(α 3 ) with the O(α 2 ) calculation, yielding small shifts of about 1 MeV [259]. The effect of Coulomb screening are estimated by taking half of the difference between Monte-Carlo samples with screened Coulomb effect and without any Coulomb effect, which amounts to about 7 MeV.…”

Section: Initial State Radiation and O(α) Effectsmentioning

confidence: 99%

Electroweak measurements in electron–positron collisions at W-boson-pair energies at LEP

2013

Physics Reports

584

446

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Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb −1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV.Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant WW and ZZ production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron-positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose-Einstein correlations between the two W decay systems arising in WW production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, m W and Γ W , the branching fraction of W decays to hadrons, B(W → had), and the trilinear gauge-boson selfcouplings g

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“…In [35] this study has been performed in the context of the full Delphi simulation and analysis procedure; furthermore the main uncertainties due to non-CC03 4-fermion background events have been studied. Radiative corrections uncertainties on non 4-fermion background events are included in the uncertainty estimated on the background.…”

Section: Electroweak Radiative Correctionsmentioning

confidence: 99%

Measurement of the mass and width of the W boson in e+e- collisions at $\sqrt{s}$ = 161–209 GeV

Abdallah¹,

Abreu²,

Adam³

et al. 2008

Eur. Phys. J. C

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A measurement of the W boson mass and width has been performed by the Delphi collaboration using the data collected during the full LEP2 programme (1996)(1997)(1998)(1999)(2000). The data sample has an integrated luminosity of 660 pb −1 and was collected over a range of centre-of-mass energies from 161 to 209 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W + W − → ℓν ℓ qq ′ and W + W − → qq ′q q ′ channels. The W mass result for the combined data set iswhere FSI represents the uncertainty due to final state interaction effects in the qq ′q q ′ channel, and LEP represents that arising from the knowledge of the collision energy of the accelerator. The combined value for the W width isThese results supersede all values previously published by the DELPHI collaboration.

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Electroweak corrections uncertainty on the W mass measurement at LEP

Cited by 4 publications

References 23 publications

Measurement of the W boson mass and width in e+e- collisions at LEP

Measurement of the W boson mass and width in e+e- collisions at LEP

Electroweak measurements in electron–positron collisions at W-boson-pair energies at LEP

Measurement of the mass and width of the W boson in e+e- collisions at $\sqrt{s}$ = 161–209 GeV

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