The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit

Abstract A set of equations representing the $W/Z$ mass ratio and various observables of $Z$ decays in terms of $\bar\alpha \equiv\alpha (m_Z)$, $G_{\mu}$, $m_Z$, $m_t$, $m_H$, $\bar\alpha_{s} \equiv\alpha_{s} (m_Z)$, $m_b$ and $m_\tau$ (all other fermion masses being neglected) are compared with th...

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Autores principales: Novikov, V A, Okun, Lev Borisovich, Rozanov, A N, Vysotsky, M I, Yurov, V P
Lenguaje:eng
Publicado: 1994
Materias:
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(94)91076-6
http://cds.cern.ch/record/258170
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author Novikov, V A
Okun, Lev Borisovich
Rozanov, A N
Vysotsky, M I
Yurov, V P
author_facet Novikov, V A
Okun, Lev Borisovich
Rozanov, A N
Vysotsky, M I
Yurov, V P
author_sort Novikov, V A
collection CERN
description Abstract A set of equations representing the $W/Z$ mass ratio and various observables of $Z$ decays in terms of $\bar\alpha \equiv\alpha (m_Z)$, $G_{\mu}$, $m_Z$, $m_t$, $m_H$, $\bar\alpha_{s} \equiv\alpha_{s} (m_Z)$, $m_b$ and $m_\tau$ (all other fermion masses being neglected) are compared with the latest data of the four LEP detectors, which at the level of one standard deviation coincide with their Born values. Our global fit gives: $m_t = 161 ^{+ 15 +16}_{-16 -22} \bar\alpha_{s} = 0.119 \pm 0.006 \pm 0.002$, where the central values correspond to $m_H = 300$ GeV, the first errors are statistical and the second ones represent shifts of the central values corresponding to $m_H = 1000$ GeV($+$) and 60 GeV($-$). The predicted mass of the top is smaller than in the recent fits by 5 GeV. The {\it predicted} values of $m_W/m_Z$ and the LEP observables, based on the fitted values of $m_t$ and $\bar{\alpha}_s$, show a weak dependence on $m_H$ and differ by several {\it predicted} standard deviations from the corresponding Born values. The uncertainties of the predicted values and their deviations from the corresponding Born values determine the experimental accuracy required to observe electroweak radiative corrections.
id cern-258170
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
record_format invenio
spelling cern-2581702019-09-30T06:29:59Zdoi:10.1016/0370-2693(94)91076-6http://cds.cern.ch/record/258170engNovikov, V AOkun, Lev BorisovichRozanov, A NVysotsky, M IYurov, V PThe values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fitParticle Physics - PhenomenologyAbstract A set of equations representing the $W/Z$ mass ratio and various observables of $Z$ decays in terms of $\bar\alpha \equiv\alpha (m_Z)$, $G_{\mu}$, $m_Z$, $m_t$, $m_H$, $\bar\alpha_{s} \equiv\alpha_{s} (m_Z)$, $m_b$ and $m_\tau$ (all other fermion masses being neglected) are compared with the latest data of the four LEP detectors, which at the level of one standard deviation coincide with their Born values. Our global fit gives: $m_t = 161 ^{+ 15 +16}_{-16 -22} \bar\alpha_{s} = 0.119 \pm 0.006 \pm 0.002$, where the central values correspond to $m_H = 300$ GeV, the first errors are statistical and the second ones represent shifts of the central values corresponding to $m_H = 1000$ GeV($+$) and 60 GeV($-$). The predicted mass of the top is smaller than in the recent fits by 5 GeV. The {\it predicted} values of $m_W/m_Z$ and the LEP observables, based on the fitted values of $m_t$ and $\bar{\alpha}_s$, show a weak dependence on $m_H$ and differ by several {\it predicted} standard deviations from the corresponding Born values. The uncertainties of the predicted values and their deviations from the corresponding Born values determine the experimental accuracy required to observe electroweak radiative corrections.hep-ph/9401338CERN-TH-7137-94-REVoai:cds.cern.ch:2581701994
spellingShingle Particle Physics - Phenomenology
Novikov, V A
Okun, Lev Borisovich
Rozanov, A N
Vysotsky, M I
Yurov, V P
The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title_full The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title_fullStr The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title_full_unstemmed The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title_short The values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at LEP: global fit
title_sort values of m$_{t}$ and $\overline{\alpha}_{s}$ derived from the non-observation of electroweak radiative corrections at lep: global fit
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0370-2693(94)91076-6
http://cds.cern.ch/record/258170
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