European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.389. ⟨10.1140/epjc/s10052-017-4943-1⟩ European Physical Journal C: Particles and Fields, 2017, 77, pp.389. ⟨10.1140/epjc/s10052-017-4943-1⟩ The European physical journal / C C77(6), 389 (2017). doi:10.1140/epjc/s10052-017-4943-1