Hadronic contribution to the running QED coupling at the Z-boson mass scale
DOI:
https://doi.org/10.31349/RevMexFis.69.020801Keywords:
QED; Z-boson massAbstract
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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Copyright (c) 2023 Cesareo Dominguez, Luis Alberto Hernandez Rosas
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