Experimental determination of the $m_b(M_Z)$ in DELPHI

The running mass of the b quark as defined in the MS-bar renormalization scheme, m_b, was measured at the M_Z scale using 2.8 million hadronic Z^0 decays collected by the DELPHI experiment at LEP. The result is m_b(M_Z) = 2.67 +- 0.25 (stat.) +- 0.34 (frag.) +- 0.27(theo.) GeV/c^2 which differs from...

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Detalles Bibliográficos
Autores principales: Marti i Gracia, S., Fuster, J., Cabrera, S.
Lenguaje:eng
Publicado: 1998
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0920-5632(97)01092-X
http://cds.cern.ch/record/332328
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author Marti i Gracia, S.
Fuster, J.
Cabrera, S.
author_facet Marti i Gracia, S.
Fuster, J.
Cabrera, S.
author_sort Marti i Gracia, S.
collection CERN
description The running mass of the b quark as defined in the MS-bar renormalization scheme, m_b, was measured at the M_Z scale using 2.8 million hadronic Z^0 decays collected by the DELPHI experiment at LEP. The result is m_b(M_Z) = 2.67 +- 0.25 (stat.) +- 0.34 (frag.) +- 0.27(theo.) GeV/c^2 which differs from that obtained at the Upsilon scale, by m_b(M_\Upsilon/2)-m_b(M_Z) = 1.49 +- 0.52 GeV/c^2. This measurement, performed far from the $b\bar{b}$ production threshold, provides the first experimental observation of the running of the quark masses.
id cern-332328
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
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spelling cern-3323282023-03-14T17:58:07Zdoi:10.1016/S0920-5632(97)01092-Xhttp://cds.cern.ch/record/332328engMarti i Gracia, S.Fuster, J.Cabrera, S.Experimental determination of the $m_b(M_Z)$ in DELPHIParticle Physics - ExperimentThe running mass of the b quark as defined in the MS-bar renormalization scheme, m_b, was measured at the M_Z scale using 2.8 million hadronic Z^0 decays collected by the DELPHI experiment at LEP. The result is m_b(M_Z) = 2.67 +- 0.25 (stat.) +- 0.34 (frag.) +- 0.27(theo.) GeV/c^2 which differs from that obtained at the Upsilon scale, by m_b(M_\Upsilon/2)-m_b(M_Z) = 1.49 +- 0.52 GeV/c^2. This measurement, performed far from the $b\bar{b}$ production threshold, provides the first experimental observation of the running of the quark masses.The running mass of the b quark as defined in the MS-bar renormalization scheme, m_b, was measured at the M_Z scale using 2.8 million hadronic Z^0 decays collected by the DELPHI experiment at LEP. The result is m_b(M_Z) = 2.67 +- 0.25 (stat.) +- 0.34 (frag.) +- 0.27(theo.) GeV/c^2 which differs from that obtained at the Upsilon scale, by m_b(M_\Upsilon/2)-m_b(M_Z) = 1.49 +- 0.52 GeV/c^2. This measurement, performed far from the $b\bar{b}$ production threshold, provides the first experimental observation of the running of the quark masses.hep-ex/9708030oai:cds.cern.ch:3323281998
spellingShingle Particle Physics - Experiment
Marti i Gracia, S.
Fuster, J.
Cabrera, S.
Experimental determination of the $m_b(M_Z)$ in DELPHI
title Experimental determination of the $m_b(M_Z)$ in DELPHI
title_full Experimental determination of the $m_b(M_Z)$ in DELPHI
title_fullStr Experimental determination of the $m_b(M_Z)$ in DELPHI
title_full_unstemmed Experimental determination of the $m_b(M_Z)$ in DELPHI
title_short Experimental determination of the $m_b(M_Z)$ in DELPHI
title_sort experimental determination of the $m_b(m_z)$ in delphi
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/S0920-5632(97)01092-X
http://cds.cern.ch/record/332328
work_keys_str_mv AT martiigracias experimentaldeterminationofthembmzindelphi
AT fusterj experimentaldeterminationofthembmzindelphi
AT cabreras experimentaldeterminationofthembmzindelphi

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