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- W3151675279 abstract "In the paper, we study the properties of the $Z$-boson hadronic decay width by using the $mathcal{O}(alpha_s^4)$-order quantum chromodynamics (QCD) corrections with the help of the principle of maximum conformality (PMC). By using the PMC single-scale approach, we obtain an accurate renormalization scale-and-scheme independent perturbative QCD (pQCD) correction for the $Z$-boson hadronic decay width, which is independent to any choice of renormalization scale. After applying the PMC, a more convergent pQCD series has been obtained; and the contributions from the unknown $mathcal{O}(alpha_s^5)$-order terms are highly suppressed, e.g. conservatively, we have $Delta Gamma_{rm Z}^{rm had}|^{{cal O}(alpha_s^5)}_{rm PMC}simeq pm 0.004$ MeV. In combination with the known electro-weak (EW) corrections, QED corrections, EW-QCD mixed corrections, and QED-QCD mixed corrections, our final prediction of the hadronic $Z$ decay width is $Gamma_{rm Z}^{rm had}=1744.439^{+1.390}_{-1.433}$ MeV, which agrees with the PDG global fit of experimental measurements, $1744.4pm 2.0$ MeV." @default.
- W3151675279 created "2021-04-13" @default.
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- W3151675279 date "2021-04-01" @default.
- W3151675279 modified "2023-10-12" @default.
- W3151675279 title "Z-boson hadronic decay width up to $${{mathcal {O}}}(alpha _s^4)$$-order QCD corrections using the single-scale approach of the principle of maximum conformality" @default.
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- W3151675279 doi "https://doi.org/10.1140/epjc/s10052-021-09092-x" @default.
- W3151675279 hasPublicationYear "2021" @default.
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