Erratum: Neutrino charge radii from COHERENT elastic neutrino-nucleus scattering [Phys. Rev. D <b>98</b>, 113010 (2018)]
M. Cadeddu, C. Giunti, Konstantin Kouzakov, Yufeng Li, Alexander Studenikin, Y. Y. Zhang
Abstract
In this erratum we revise the results given in the paper concerning the limits on the neutrino charge radii obtained from the analysis of the COHERENT data, that were affected by an incorrect treatment of the antineutrino contribution. In the paper we took into account the fact that neutrinos and antineutrinos have opposite charge radii, but we did not notice that also the weak neutral current couplings change sign from neutrinos to antineutrinos. Indeed, both the electromagnetic vector current and the V -A weak neutral current change sign under a CP transformation that changes left-handed neutrinos into righthanded antineutrinos. Therefore the relative sign of the weak neutral current and charge radius contributions does not change from neutrinos to antineutrinos. This correction leads to significant changes of the limits on the neutrino charge radii obtained from the analysis of the COHERENT data.