K0πand K*0Σ+ photoproduction off the proton
- Resource Type
- Authors
- M. Nanova; Cbelsa
- Source
- The European Physical Journal A. 35:333-342
- Subject
- Physics
Nuclear physics
Nuclear and High Energy Physics
Angular distribution
Photon
Proton
Hyperon
Pi
Sigma
Production (computer science)
State (functional analysis)
Nuclear Experiment
- Language
- ISSN
- 1434-601X
1434-6001
The exclusive reactions $\gamma p \to K^{*0} \Sigma^+(1189)$ and $\gamma p \to K^{0} \pi^{0}\Sigma^+(1189)$, leading to the p 4$\pi^{0}$ final state, have been measured with a tagged photon beam for incident energies from threshold up to 2.5 GeV. The experiment has been performed at the tagged photon facility of the ELSA accelerator (Bonn). The Crystal Barrel and TAPS detectors were combined to a photon detector system of almost 4$\pi$ geometrical acceptance. Differential and total cross sections are reported. At energies close to the threshold, a flat angular distribution has been observed for the reaction $\gamma p\to K^{0} \pi^{0}\Sigma^+$ suggesting dominant s-channel production. $\Sigma^*(1385)$ and higher lying hyperon states have been observed. An enhancement in the forward direction in the angular distributions of the reaction $\gamma p \to K^{*0}\Sigma^+$ indicates a $t$-channel exchange contribution to the reaction mechanism. The experimental data are in reasonable agreement with recent theoretical predictions.