Differential cross-section at  * =3.5 m  Measured over a large |t| range, will be extended  Dip-hump structure first seen at ISR, also present here  Compared to models  Exponent: 7.8 ± 0.3  Slope: 23.5 ± 0.5 GeV ˗ 2  Dip: 0.53 ± 0.5 GeV 2 EPL, 95 (2011)