Study of the reactions K −p → Λ0+ neutrals in the C.M. energy range from 1580 to 1750 MeV

Abstract

Results on the channels K −p → Λ 0 η 0, Λ 0 π 0, Σ 0 π 0, Λ 0 π 0 π 0 and Σ 0 π 0 π 0 are obtained in a K −p formation experiment using 1 million photographs taken in a heavy liquid bubble chamber filled with a CF 3BrC 3H 8 mixture. The results are compared with hydrogen bubble chamber (HBC) experiments and with experiments having full or partial gamma-ray detection. Our Λ 0 π 0 and Λ 0 + neutral cross section agree with HBC results. Our Σ 0 π 0 cross section does not exhibit a bump at 1670 MeV as previously seen in HBC experiments. Our Λ 0 π 0 π 0 data are dominated by a Σ(1385) π 0 production. Our Σ 0 π 0 π 0 data is consistent with the presence of some Σ(1405) π 0 production.