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Update on Forward Pion Reactions in Particle Physics Experiments

Recent results from test30 and test35 experiments by V. Ivanchenko discussing momentum balance, energy levels, and reaction outcomes in relation to identified challenges in the study of forward pion reactions. Details and findings can be accessed via provided links.

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Update on Forward Pion Reactions in Particle Physics Experiments

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  1. Recent results with test30, 35 V.Ivanchenko, A.Ivantchenko 10 November 2008 V.Ivanchenko 10.11.08

  2. V.Ivanchenko 10.11.08

  3. V.Ivanchenko 10.11.08

  4. 4-momentum balance unchanged n + Si → p + X, ref09 V.Ivanchenko 10.11.08

  5. Test30 results • Today run for 9.1ref09 • Bertini Coulomb barrier is fixed • 22 MeV Al and Fe are fine • 22 MeV Zr problem remain • 4-momentum balance unchanged V.Ivanchenko 10.11.08

  6. Updates in test35:forward pions reactions http://www.cern.ch/antoni/verification/ V.Ivanchenko 10.11.08

  7. Scale in final momentum extended up to the beam Linear histograms in cross section Integration over θ bins π+ + A → π- + X, π+ + Xπ- + A → π- + X, π+ + X V.Ivanchenko 10.11.08

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  14. At 8 GeV there is a large overestimate of quasi-elastic in QGS V.Ivanchenko 10.11.08

  15. V.Ivanchenko 10.11.08

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  17. Summary • Preliminary results for new data included in test35 show number of problems • FTF and QGS are different at this energies • Overestimate of quasi-elastic in QGS grows when beam energy decreases • Bertini usually show deficit of pion produced • Binary has no pions V.Ivanchenko 10.11.08

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