Hadronic contribution to the running QED coupling at the Z-boson mass scale


  • Cesareo Dominguez University of Cape Town
  • Luis Alberto Hernandez Rosas Departamento de Física, Universidad Autónoma Metropolitana




QED; Z-boson mass


An update is described of a model independent method to determine the hadronic contribution to the QED running coupling at the Zboson mass scale, ∆αHAD(M2 Z ). The major source of uncertainty is from the contribution of the light quark vector current correlator at zero momentum. This uncertainty is substantially reduced using recently improved lattice QCD results for this correlator. The result is ∆αHAD(M2 Z ) = 274.13(0.73) × 10−4


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How to Cite

C. Dominguez and L. A. Hernandez Rosas, “Hadronic contribution to the running QED coupling at the Z-boson mass scale”, Rev. Mex. Fís., vol. 69, no. 2 Mar-Apr, pp. 020801 1–, Mar. 2023.