1 Erratum to: Eur. Phys. J. C (2014) 74:3110 DOI 10.1140/epjc/s10052-014-3110-1

It has been found that three of the spin-density matrix elements (SDMEs) in Fig. 6 of the published paper were incorrectly labeled. The labels have been fixed, while none of the results or conclusions have changed.

Fig. 6
figure 1

The 23 SDMEs for exclusive \(\omega \) electroproduction extracted in the entire HERMES kinematic region with \( \langle Q^2 \rangle = 2.42\) GeV\(^2\), \(\langle W\rangle =4.8\) GeV, \(\langle -t'\rangle = 0.080\) GeV\(^2\). Proton data are denoted by squares and deuteron data by circles. The inner error bars represent the statistical uncertainties, while the outer ones indicate the statistical and systematic uncertainties added in quadrature. Unpolarized (polarized) SDMEs are displayed in the unshaded (shaded) areas