Low-E Iron LDF

Average AIRES output for electrons and muons.

LDF fits to electrons and muons. Updated: R_M is allowed to vary for muons.
Fit parameters vs. Energy. Updated: Full range plotted; R_M varies for muons.
Fit parameters vs. Zenith angle. Updated: Full range plotted; R_M varies for muons.

Using Moliere Radius = 102.5 for muons:

• LDF fits
• Fit parameters vs. Energy
• Fit parameters vs. Zenith Angle
• Fits to alpha, delta, eta, and logC

Using Moliere Radius = 82.0 for electrons, 102.5 for muons, and delta = -0.4 for electrons, -0.9 for muons:

• LDF fits
• Fit parameter trends
• LDF fits with only C a free parameter
• LogC vs LogE for all ZAs
• Trend with ZA in the LogC vs LogE offset
• Derived LDF vs. simulated data Looks OK, but not perfect... parameters may need fine-tuning.
• Trend of logC with logE (Redone)
• Trend of logC with cosZA (Redone)
• Derived LDF vs. simulated data (Redone... Looks better.)
• Ratio of AIRES data / LDF Compare with: AGASA LDF ratios

The parameters of the low-E iron LDF for electrons are:

• Rm_e = 82.0
• delta_e = -0.4
• alpha_e = 2.20 - 0.63 cosZA
• eta_e = 0.45 + 2.99 cosZA
• C_e = -20.925 + 1.0943 logE + 4.8215 cosZA

The parameters of the low-E iron LDF for muons are:

• Rm_m = 102.5
• delta_m = -0.9
• alpha_m = 0.11 - 0.52 cosZA
• eta_m = 1.31 + 0.74 cosZA
• C_m = -15.946 + 0.925 logE + 1.169 cosZA