The 6Li(K −, π+) Σ6H reaction and narrow Σ states

Abstract

Small-angle cross sections are calculated for 6Li(K −, π +) Σ 6H at 720 MeV/ c, in order to intepret the data of the preceding paper. Due to the spin-isospin selectivity of ΣN → ΛN conversion, the substitution 1s N → 1s Σ leads to a narrow resonance high in the Σ continuum. Further tests of selectivity with 3,4He targets are suggested. The energy shifts of Σ states which arise from the spin-isospin dependence of the ΣN interaction are discussed.