A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to
Jul 31, 201913 pages
Published in:
- Eur.Phys.J.C 80 (2020) 3, 241,
- Eur.Phys.J.C 80 (2020) 5, 410 (erratum)
- Published: Mar 14, 2020
e-Print:
- 1908.00921 [hep-ph]
DOI:
Citations per year
Abstract: (Springer)
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 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 channel. For the muon , we find for the lowest-order hadronic contribution . The full Standard Model prediction differs by from the experimental value. The five-quark hadronic contribution to is evaluated to be .Note:
- 13 pages, 9 figures and 2 tables, published version in EPJ-C. arXiv admin note: substantial text overlap with arXiv:1706.09436
- vacuum polarization: hadronic
- muon: magnetic moment
- coupling constant
- electromagnetic
- dispersion
- anomaly
- hadron
- KLOE
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