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Heavy particles in π - brick interactions

This study using GEANT3.2 delves into inelastic interactions of π- with a focus on heavy particle distributions in emulsions. Results reveal proton presence in nearly all cases, often accompanied by deuton, triton, or alpha particles.

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Heavy particles in π - brick interactions

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  1. Heavy particles in π- brick interactions • Frame: GEANT3.2 with one brick as geometry. Option FLUKA • This is the Geant part of GENIMA • 5000: 4 and 8 GeV/c, π-, Ѳ = 0 mrad • Inelastic interaction: a π- < 3.8 (7.8) GeV/c observed in one of the 56 emulsions J. Favier

  2. Results 4 GeV/c • With a beam of 5000 4 GeV/c pions: • 1494 interaction ( 30 %) : 1231 protons ( 82.4 % ) 104 deuton ( 7 % ) 48 triton ( 3.2 % ) 105 alpha ( 7 % ) 0 heavier nuclei ( 0 %) in 1494 interactions, 119 show either d,t,α present in the emulsions : = 8 % J. Favier

  3. Results 8 GeV/c • 1463 interaction 29 % : (Geisha 30%) 1223 protons 83.6 % (89%) 136 deuton 9.3 % (43%) 57 triton 3.9 % (25%) 131 alpha 9 % (6%) 0 heavier nuclei 0 % 0 in 1463 interactions, 263 show either d,t,α present in the emulsions : = 18 % (56 %) J. Favier

  4. Momentum and angle distributions4 GeV/c J. Favier

  5. 8 GeV/c J. Favier

  6. Ev 10 No Fog J. Favier

  7. Ev 10 fog=8 J. Favier

  8. Ev 10 Fog=8 Filtre J. Favier

  9. Conclusions • In nearly all interactions presence of at least one proton (82-84 %) • Accompanied in 8-18 % of interactions by d,or t, or α J. Favier

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