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Particle Fluxes from Muon-Muon Collisions

Particle Fluxes from Muon-Muon Collisions. Sergei Striganov Fermilab Muon Collider Physics Workshop Fermilab November 10-12, 2009. Introduction. General feature of μ + μ - events ( Pythia )

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Particle Fluxes from Muon-Muon Collisions

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  1. Particle Fluxes from Muon-Muon Collisions Sergei Striganov Fermilab Muon Collider Physics Workshop Fermilab November 10-12, 2009

  2. Introduction • General feature of μ+μ- events (Pythia) • Background produced in interaction of particles from μ+μ- collisions with tungsten shielding (Pythia + MARS15) • Compare particle fluxes from μ+μ- collisions with machine background

  3. μ+μ- →γ*/Z0 events“detectable” energy – 1300 GeV

  4. Charged particle fluence (1/cm2) with tungsten shielding without tungsten shielding

  5. Neutron fluence (1/cm2) with tungsten shielding without tungsten shielding

  6. Energy spectra in tracker (+-46x46x5cm) with and without tungsten shielding

  7. Charged particles fluence

  8. Electron/positron fluence

  9. Muon fluence

  10. Photon fluence

  11. Neutron fluence

  12. Events with heavy Higgs (300 GeV)“detectable” energy – 350 GeV

  13. Charged meson fluence

  14. Electron/positron fluence

  15. Muon fluence

  16. Photon fluence

  17. Neutron fluence

  18. Energy spectra in tracker (+-46x46x5cm)Blue lines - from machine, red lins – Z0 events, green lines – Higgs events.

  19. Charged hadron fluence.Blue points - from machine, red points – Z0 events, green points – Higgs events.

  20. Electron/positron fluenceBlue points - from machine, red points – Z0 events, green points – Higgs events.

  21. Muon fluenceBlue points - from machine, red points – Z0 events, green points – Higgs events.

  22. Neutron fluence. Blue points - from machine (10-12 GeV), pink points – Z0 events (10-12 GeV),red points – Z0 events (10-4 GeV), green points – Higgs events (10-4 GeV).

  23. Photon fluenceBlue points - from machine (10-12 GeV), pink points – Z0 events (10-12 GeV),red points – Z0 events (10-4 GeV), green points – Higgs events (10-4 GeV).

  24. Conclusion • Interactions of particles created in μ+μ- collisions with tungsten shielding produce large photon/neutron background in tracker • Fluxes of particles coming from machine are much larger then fluxes of particles produced in μ+μ- collisions • More detailed study is needed to clarify question: is current level of machine background acceptable or additional efforts are essential

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