1 Erratum to: Eur. Phys. J. C (2015) 75:510 DOI 10.1140/epjc/s10052-015-3726-9

Unfortunately in the HTML of the article the authors, M. Ishino, T. Kunigo, T. Sumida and T. Tashiro, are assigned to the wrong affiliation.

In the PDF of the article the assignment to the affiliation is correct.