Three-quark force effect in proton–proton scattering at 7, 8 and 13 TeV M. A. Hassan, A. A. E. Hefny and T. N. E. Salama Eur. Phys. J. C, 79 7 (2019) 599 Published online: 16 July 2019 DOI: 10.1140/epjc/s10052-019-7102-z