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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 Sergio Pastor and Ofelia Pisanti
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
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
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
Simulation of induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2
Simulation of induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2
Simulation of induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2
Simulation of induced shower: the state of the art MRST Leading Order PDF’s: x ≥ 10-6; 1.25 GeV2 ≤ Q2 ≤ 107 GeV2
Simulation of induced shower: the state of the art HERWIG FI summary(with MRST PDF’s)
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
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°
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°
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.
Simulation of induced shower: the state of the art HDPM HDPM QGSJET QGSJET E = 1015 eV = 70° = 0°
Simulation of induced shower: the state of the art E = 1019 eV = 70° = 0°
Simulation of induced shower: the state of the art E = 1019 eV = 70° = 0°
Simulation of induced shower: the state of the art E = 1019 eV = 70° = 0°
Simulation of induced shower: the state of the art E = 1019 eV = 70° = 0°
Simulation of induced shower: the state of the art E = 1019 eV = 70° = 0°
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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