Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering

摘要

Large samples of Λ, Σ(1385) and Ξ(1321) hyperons produced in the deep-inelastic muon scattering off a 6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of Σ(1385)~+, Σ(1385)~?, Σ(1385)~?, Σ(1385)~+, Ξ(1321)~?, and Ξ(1321)~+ hyperons decaying into Λ(Λ)π were measured. The ratios of heavy-hyperon to Λ and heavy-antihyperon to Λ were found to be in the range 3.8 % to 5.6 % with a relative uncertainty of about 10 %. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.