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  • +5
  • Patrick Janot,
  • Alain Blondel,
  • Gigi Rolandi,
  • Patrizia Azzi,
  • tenchini,
  • fulvio piccinini,
  • Christophe Grojean,
  • Ayres Freitas
Patrick Janot
European Organization for Nuclear Research (CERN)
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Alain Blondel
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Gigi Rolandi
European Organization for Nuclear Research (CERN)
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Patrizia Azzi
European Organization for Nuclear Research (CERN)
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tenchini
European Organization for Nuclear Research (CERN)
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fulvio piccinini
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Christophe Grojean
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Ayres Freitas
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Abstract

When the measurements from the FCC-ee become available, an improved determination of the standard-model ”input” parameters will be needed to fully exploit the new precision data towards either constraining or fitting the parameters of beyond-the-standard-model theories. Among these input parameters is the electromagnetic coupling constant estimated at the Z mass scale, \(\alpha_{\rm QED}(m^{2}_{\rm Z})\). The measurement of the muon forward-backward asymmetry at the FCC-ee, just below and just above the Z pole, can be used to make a direct determination of \(\alpha_{\rm QED}(m^{2}_{\rm Z})\) with an accuracy deemed adequate for an optimal use of the FCC-ee precision data.