Photoproduction of K +Λ O and K +Σ O from hydrogen at constant momentum transfer t between 1.05 and 2.2 GeV
For the reaction γp → K +Λ0 the differential cross section has been measured at t = -0.147 GeV 2 ( θC.M. = 26.5 ± 3.5°) and photoenergies between 1.05 and 2.2 GeV and for the reaction γp→K +Σ0 at ≈-0.17 GeV 2 ( θC.M. = 28±3.5°) and photoenergies between 1.3 and 2.2 GeV. For this four momentum transfer the differential cross section of K +Λ 0 photoproduction has a surprising steep increase above threshold and stays nearly constant up to 2.2 GeV. The K +Σ 0 cross section increases from 1.3 to 1.56 GeV and goes down gradually at higher energies.