CIC method applied to the KASCADE-Grande muon data
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Transcript of CIC method applied to the KASCADE-Grande muon data
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CIC method applied to the KASCADE-Grande muon data
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
Juan Carlos Arteaga-Velázquezfor the KASCADE-Grande Collaboration
Institute of Physics and MathematicsUniversidad Michoacana
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The KASCADE-Grande experiment
KASCADE-Grande (Karlsruhe Shower Core and array detector)
E = 1016 - 1018 eV
Grande detectors measure e/ + component simultaneously
KASCADE shielded scintillators allow to measure component of EAS. (E > 230 MeV sec)
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Reconstruction of N
Measured densities in KASCADE
(r) = N f(r)
N = n(ri) / [f(ri)Aicos(z)]
f(r) known from MC simulations
N corrected from reconstruction systematics
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon spectra
Teff = 603.1 daysKG data Events
53423
28053
7082
1657
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Integral muon spectra
Apply cut at constant Jcut
For a given Jcut, get N()
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon attenuation curves
Get attenuation curves Choose the mean
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Reference angle
For the moment use only showers < 42o
N24 of each event
Find reference angle ref for normalization:
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon spectra
Good agreement between muon spectra for vertical showers
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon spectra
Difference between MC and KG muon attenuation lengths
FLUKA/QGSJET II
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon spectrum for vertical showers
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Muon number systematic uncertainties
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting
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Summary
Using the CIC method, we compared the muon spectra for different without the influence of MC models.
Good agreement among reconstructed muon spectra from KG data on vertical showers with the CIC method.
Simulated Λ is different from the one obtained from the CIC method and the KG data.
CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting