1 Erratum to: Eur. Phys. J. C (2019) 79:491https://doi.org/10.1140/epjc/s10052-019-7009-8

The author Hosam Mohammed is affiliated to

Physics Department, Beni Suef University, Beni Suef, 62514 Egypt

This was his affiliation when Ref. [1] was in progress, when it was published and even today it is his current affiliation. All other affiliations in the paper were correct at the time of writing. We regret that it was omitted in the original publication.