Speaker
Dr
Daisuke Nomura
(KEK)
Description
This work presents a complete re-evaluation of the hadronic vacuum polarization contributions to the anomalous magnetic moment of the muon from the combination of e+ e- --> hadrons cross section data. Focus has been placed on the development of a new data combination method, which fully incorporates
all correlated statistical and systematic uncertainties in
a bias free approach. All available e+ e- --> hadrons cross
section data have been analyzed and included, where the new
data compilation has yielded the full hadronic R-ratio and
its covariance matrix in the energy range $m_{\pi} < \sqrt{s} < 11.2 GeV$. Using these combined data and perturbative QCD
above that range results in estimates of the hadronic vacuum
polarization contributions to g-2 of the muon of
$a_{\mu}^{had, LO VP} = (693.27 \pm 2.46 ) x 10^{-10}$ and $a_{\mu}^{had,NLO VP}
= ( -9.82 \pm 0.04 ) x 10^{-10}$. The new estimate for the Standard
Model prediction is found to be $a_{\mu}^{SM} = (11 659 182.05 \pm 3.56) x10^{-10}$, which is $3.7\sigma$ below the current experimental measurement.
Primary author
Dr
Daisuke Nomura
(KEK)
