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

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

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

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

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

Muon attenuation curves

Get attenuation curves Choose the mean

CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting

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

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

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

Muon spectrum for vertical showers

CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting

Muon number systematic uncertainties

CIC method applied to KG muon data – J.C. Arteaga Malargüe 2008, PAO Coll. Meeting

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