Erratum to "Measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ cross section between 600 and 900 MeV using initial state radiation"

Abstract

In Phys. Lett. B 753, 629-638 (2016) [arXiv:1507.08188] the BESIII collaboration published a cross section measurement of the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ in the energy range between 600 and 900 MeV. In this erratum we report a corrected evaluation of the statistical errors in terms of a fully propagated covariance matrix. The correction also yields a reduced statistical uncertainty for the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, which now reads as $a_{\mu }^{\pi \pi ,\mathrm{LO}}(600-900\mathrm{MeV})=(368.2\pm 1.5_{\mathrm{stat}}\pm 3.3_{\mathrm{syst}})\times 10^{-10}$. The central values of the cross section measurement and of $a_{\mu }^{\pi \pi ,\mathrm{LO}}$, as well as the systematic uncertainties remain unchanged.

10 pages, 3 figures, accepted by Phys. Lett. B

References in corpus (2)

• The $g-2$ of charged leptons, $\alpha (M_Z^2)$ and the hyperfine splitting of muonium
• Update of the e^+e^-\toπ^+π^- cross section measured by SND detector in the energy region 400<\sqrt{s}<1000 MeV

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