Measurement of the reaction $γp \rightarrow K^ + Σ^{\pm}π^{\mp}$ at photon energies up to 2.6 GeV
nucl-ex
/ Authors
I. Schulday, R. Lawall, J. Barth, K. -H. Glander, S. Goers, J. Hannappel, N. Jöpen, F. Klein, E. ~Klempt, D. Menze
and 2 more authors
/ Abstract
The reactions $γp \rightarrow K^{+}Σ^{\pm}π^{\mp}$ were studied with the SAPHIR detector using a tagged photon beam at the electron stretcher facility ELSA in Bonn. The decays $Σ^{-} \rightarrow nπ^{-}$ and $Σ^{+} \rightarrow nπ^{+}, pπ^0$ were fully reconstructed. Reaction cross sections were measured as a function of the photon energy from threshold up to $2.6\,$GeV with considerably improved statistics compared to a previous bubble chamber measurement. The cross sections rise monotonously with increasing photon energy. The two-particle mass distributions of $Σ^{\pm}π^{\mp}$ and $K^+π^-$ show substantial production of resonant states.