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Production of Baryonic States via Stopped Pion in 3He Target

This study focuses on the production of S=-2 baryonic states through stopped pion interactions in a 3He target. The process involves multiple steps, including creating Ξ- and K0 from K*-, detecting charged particles, and studying delayed decays. Experimental techniques involve PM target, straw tracker, and multi-step event reconstruction.

ray-ramsey
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Production of Baryonic States via Stopped Pion in 3He Target

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  1. large p stop rate on a 3He target n K*- p n p K*+ p K0 Y Y Ξ- p Ξ- K*- H p Production of S = -2 baryonic states via (K*, K) using stopped p e.g. : p p → K*- K*+ S= - 2 states step 1 : step 2 : K*- n → Ξ- K0 n p p low relative energy very low recoil on Ξ- ( recoil free kinematics ) 3He

  2. p d → Ξ- Ks0 K*+ Production of S = -2 baryonic states Ξ- production detector multiplicity of charged particles primary reaction (step 1 + step 2 ) PM target gas supply straw tracker mini target cell 2 Ks0π+ delayed decays cτ = 4.9 cm cτ = 2.7 cm π+π- ~2m π+π- p Λπ- cτ = 7.9 cm 8 final state p π- → reaction trigger = multiplicity increase segmented start scintillator outer scintillator 3 layer “quirl” structure geometry → event reconstruction

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