Evidence for a narrow peak in Ksoπ±π+π- at 2.6 gev in 12 gev/ cpp interactions

Abstract We report the evidence for a narrow charged peak (5.5 s.d.), which we suggest calling the I, in the 6-prong-V 0 topology of p p interactions at 12 GeV/ c . The mass, widht and the product of cross section σ I times the branching ratio BR into the final state (K s o τ±τ + τ − are found to be: M I =2.60 ± 0.01 GeV / c 2 , Γ I ⩽ 0.018 GeV / c 2 , σ I ·BR≈20 μbarn