1 Erratum to: Eur. Phys. J. C (2021) 81:969 https://doi.org/10.1140/epjc/s10052-021-09770-w

In this article the following acknowledgment was omitted:

This work was supported by the CHIST-ERA grant CHIST-ERA-19-XAI-009, by INFN and MIUR Italy.

The original article has been corrected.