Data are presented on the reactions K ± p → π 0 X, K ± p → η X, pp → π 0 X and p p → π 0 X in the kinematic region with s ⋍ 200 GeV 2 , x ≳ 0.7 and − t ≲ 1 GeV 2 . The data agree well with the predictions of triple-Regge theory and the K ∗ and nucleon Regge trajectories extracted from the data agree with the linear trajectories extrapolated from the particle poles.
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The differential cross section for K+p elastic scattering has been measured at several momenta in the interval 200-600 MeV/c within a hydrogen bubble chamber. The data have been fitted with a partial-wave analysis. We obtain solutions which are dominated over the entire momentum range by s-wave scattering, with constructive interference between the nuclear and Coulomb scattering. The effective-range approximation with only s waves yields a K+p scattering length a=−0.314±0.007 F and an effective range r0=0.36±0.007 F. The measured total inelastic cross section at 588 MeV/c is 11−5+9 μb.
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We present data on π0 and η inclusive production from 100-GeV/c π±p collisions in the kinematic region x>~0.7 and 0<−t≲4 (GeV/c)2. The results are in excellent agreement with the predictions of triple-Regge theory and we have extracted the ρ and A2 trajectories out to −t=4 (GeV/c)2.
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