A + beam of 12 GeV momentum is sent into a bubble chamber. An event is

A π⁺ beam of 12 GeV momentum is sent into a bubble chamber. An event is observed with two positive tracks originating from the primary vertex and two V⁰_s pointing to that vertex. The measurements of the momenta of the two tracks of the first V⁰ and of the angle between them give p₁₊ = 0.4 GeV, p_1-= 1.9 GeV and θ₁ = 24.5 and for the second one give p₂₊ = 0.75 GeV, p_2- 0.25 GeV and θ₂ = 22. Assume a relative accuracy of 5%. Determine the nature of the two particles from which the V⁰_s originate, and guess the complete reaction.