Erratum to "Measurement of the $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}$ 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 $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}$ 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 $a_{\hat{I}}{¼}^{\ddot{I}€\ddot{I}€,\mathrm{LO}}(600-900\mathrm{MeV})=(368.2\pm 1.5_{\mathrm{stat}}\pm 3.3_{\mathrm{syst}})\times 10^{-10}$. The central values of the cross section measurement and of $a_{\hat{I}}{¼}^{\ddot{I}€\ddot{I}€,\mathrm{LO}}$, as well as the systematic uncertainties remain unchanged.

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