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Hadronic contributions to electroweak parameter shifts

A detailed analysis

  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

Usinge + e −-data, an updated analysis of hadronic contributions to electroweak parameter renormalizations is presented. We emphasize the estimate of uncertainties which is important for precision tests at LEP and SLC. ForM z =93 GeV and sin2 Θ 0=0.22 hadronic contributions from 5 flavors are found to be

$$\Delta r_{had}^{(5)} = 0.0326 \pm 0.0007(\Delta r_{QED,had}^{(5)} = 0.0286 \pm 0.0007)$$

and

$$\Delta g_{had}^{(5)} = 0.0602 \pm 0.0016(\Delta g_{3\gamma ,had}^{(5)} = 0.0619 \pm 0.0016)$$

for the renormalization of α and α g =α/sin2 Θ 0, respectively. Parameter shifts are calculated and uncertainties due to higher order effects are estimated.

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  1. F. Jegerlehner

    Present address: Fakultät für Physik, Universität, D-4800, Bielefeld 1, Federal Republic of Germany

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  1. Institut für theoretische Physik, Universität, CH-3012, Bern, Switzerland

    F. Jegerlehner

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Jegerlehner, F. Hadronic contributions to electroweak parameter shifts. Z. Phys. C - Particles and Fields 32, 195–207 (1986). https://doi.org/10.1007/BF01552495

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