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Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data
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Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data
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Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data
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Journal Article
Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data
2017
Overview
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
e
+
e
-
→
hadrons
cross-section data (among others) from the BABAR and VEPP-2000 experiments. For the muon
(
g
-
2
)
/
2
we find for the lowest-order hadronic contribution
(
693.1
±
3.4
)
×
10
-
10
, improving the precision of our previous evaluation by 21%. The full Standard Model prediction differs by
3.5
σ
from the experimental value. The five-quark hadronic contribution to
α
(
m
Z
2
)
is evaluated to be
(
276.0
±
0.9
)
×
10
-
4
.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
