European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, 2016, 76, pp.4. ⟨10.1140/epjc/s10052-015-3743-8⟩ European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76, pp.4. ⟨10.1140/epjc/s10052-015-3743-8⟩ The European physical journal / C 76(1), 4 (2016). doi:10.1140/epjc/s10052-015-3743-8