A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to [Formula omitted]

We reevaluate the hadronic vacuum polarisation contributions to the muon magnetic anomaly and to the running of the electromagnetic coupling constant at the Z-boson mass. We include newest [Formula omitted] cross-section data together with a phenomenological fit of the threshold region in the evalua...

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Published inThe European physical journal. C, Particles and fields Vol. 80; no. 3
Main Authors Davier, M, Hoecker, A, Malaescu, B, Zhang, Z
Format Journal Article
LanguageEnglish
Published Springer 14.03.2020
Subjects
Analysis
Electromagnetism
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Abstract We reevaluate the hadronic vacuum polarisation contributions to the muon magnetic anomaly and to the running of the electromagnetic coupling constant at the Z-boson mass. We include newest [Formula omitted] cross-section data together with a phenomenological fit of the threshold region in the evaluation of the dispersion integrals. The precision in the individual datasets cannot be fully exploited due to discrepancies that lead to additional systematic uncertainty in particular between BABAR and KLOE data in the dominant [Formula omitted] channel. For the muon [Formula omitted], we find for the lowest-order hadronic contribution [Formula omitted]. The full Standard Model prediction differs by [Formula omitted] from the experimental value. The five-quark hadronic contribution to [Formula omitted] is evaluated to be [Formula omitted].
AbstractList We reevaluate the hadronic vacuum polarisation contributions to the muon magnetic anomaly and to the running of the electromagnetic coupling constant at the Z-boson mass. We include newest [Formula omitted] cross-section data together with a phenomenological fit of the threshold region in the evaluation of the dispersion integrals. The precision in the individual datasets cannot be fully exploited due to discrepancies that lead to additional systematic uncertainty in particular between BABAR and KLOE data in the dominant [Formula omitted] channel. For the muon [Formula omitted], we find for the lowest-order hadronic contribution [Formula omitted]. The full Standard Model prediction differs by [Formula omitted] from the experimental value. The five-quark hadronic contribution to [Formula omitted] is evaluated to be [Formula omitted].
Audience Academic
Author Davier, M
Hoecker, A
Malaescu, B
Zhang, Z
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Electromagnetism
Title A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to [Formula omitted]
Volume 80
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