European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.580. ⟨10.1140/epjc/s10052-015-3710-4⟩ European Physical Journal C: Particles and Fields, 2015, 75, pp.580. ⟨10.1140/epjc/s10052-015-3710-4⟩ The European physical journal / C 75(12), 580 (2015). doi:10.1140/epjc/s10052-015-3710-4