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Simulation of  induced showers: the state of the art

Simulation of  induced showers: the state of the art. Sergio Pastor and Ofelia Pisanti. A brief summary…. Simulation of  induced shower: the state of the art. First version of the program presented in the April 2002 Meeting:  cross-section not present , flat atmosphere

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Simulation of  induced showers: the state of the art

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  1. Simulation of  induced showers: the state of the art Sergio Pastor and Ofelia Pisanti

  2. A brief summary… Simulation of  induced shower: the state of the art • First versionof the program presented in the April 2002 Meeting:  cross-section not present, flat atmosphere • More complete version presented in the November 2002 Meeting: NC and CC interaction, curved atmosphere Limits • simplified target: nucleons • hadronic interaction handled • by HDPM • low statistics (only 10 showers for each inclination) no possibility to go to high energies

  3. Flow Diagram Simulation of  induced shower: the state of the art Calculate the first interaction point (chi is the interaction length) chi CORSIKA main program BOX2 BOX2  type, energy, target CORSIKA intermediate stack FI particles Link routine between CORSIKA and HERWIG NUINT HERWIG

  4. Deep Inelastic Kinematics Simulation of  induced shower: the state of the art Eprimary=1015 eV Eprimary=1012 eV Eprimary=1018 eV Q2  - q2 = -(k-k’)2 x = Q2/(2 mN) y = / E = (E-El)/ E Q2 = 2 mN E x y

  5. Simulation of  induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2

  6. Simulation of  induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2

  7. Simulation of  induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2

  8. Simulation of  induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2

  9. Simulation of  induced shower: the state of the art HERWIG FI summary(with MRST PDF’s)

  10. Simulation of  induced shower: the state of the art Results GAP-Note-2003-013 • Main information: • the lepton carries away an average energy fraction of ~ .70 • the fraction of CC events with respect to NC ones is ~ .73 in e showers, with a “good” probability (~ 73%), ~70% of the energy of the primary  goes to the e.m. component E = 1015 eV  = 70°  = 0° in m showers ~70% of the energy of the primary  is hidden

  11. Simulation of  induced shower: the state of the art Results GAP-Note-2003-013 the difference between e and p showers is in the energy of the outgoing electron of the first CC interaction E = 1015 eV  = 70°  = 0°

  12. Simulation of  induced shower: the state of the art Results GAP-Note-2003-013 the NC component of e showers lowers the average height of the longitudinal distribution E = 1015 eV  = 70°  = 0°

  13. Towards higher energies… Simulation of  induced shower: the state of the art A new .car file has been prepared, which includes a new option for producing the modified CORSIKA Fortran code with primaries. This allows us to obtain (for free) the corresponding versions with other hadronic interaction models (QGSJET, DPMJET, NEXUS, …) At the same time, we have started a deeper study of the FI with HERWIG, with the aim of singling the main quantities which characterizes it.

  14. Simulation of  induced shower: the state of the art HDPM HDPM QGSJET QGSJET E = 1015 eV  = 70°  = 0°

  15. Simulation of  induced shower: the state of the art E = 1019 eV  = 70°  = 0°

  16. Simulation of  induced shower: the state of the art E = 1019 eV  = 70°  = 0°

  17. Simulation of  induced shower: the state of the art E = 1019 eV  = 70°  = 0°

  18. Simulation of  induced shower: the state of the art E = 1019 eV  = 70°  = 0°

  19. Simulation of  induced shower: the state of the art E = 1019 eV  = 70°  = 0°

  20. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  21. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  22. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  23. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  24. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  25. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  26. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  27. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  28. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  29. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  30. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  31. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  32. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  33. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  34. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  35. Simulation of  induced shower: the state of the art HERWIG FI (going to lower x…) GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

  36. Simulation of  induced shower: the state of the art MRST vs GRV MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2 GRV 98 Leading Order PDF’s: x ≥ 10-9; 0.8 GeV2 ≤ Q2 ≤ 109 GeV2

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