European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2021, 81 (4), pp.337. ⟨10.1140/epjc/s10052-020-08777-z⟩ BASE-Bielefeld Academic Search Engine European Physical Journal C, 81(4):337. Springer New York The European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2021, 81 (4), ⟨10.1140/epjc/s10052-020-08777-z⟩