Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ankle-like Feature in the Energy Spectrum of Light Elements of Cosmic
  Rays Observed with KASCADE-Grande   Recent results of the KASCADE-Grande experiment provided evidence for a mild
knee-like structure in the all-particle spectrum of cosmic rays at $E =
10^{16.92 \pm 0.10} \, \mathrm{eV}$, which was found to be due to a steepening
in the flux of heavy primary particles. The spectrum of the combined components
of light and intermediate masses was found to be compatible with a single power
law in the energy range from $10^{16.3} \, \mathrm{eV}$ to $10^{18} \,
\mathrm{eV}$. In this paper, we present an update of this analysis by using
data with increased statistics, originating both from a larger data set
including more recent measurements and by using a larger fiducial area. In
addition, optimized selection criteria for enhancing light primaries are
applied. We find a spectral feature for light elements, namely a hardening at
$E = 10^{17.08 \pm 0.08} \, \mathrm{eV}$ with a change of the power law index
from $-3.25 \pm 0.05$ to $-2.79 \pm 0.08$.

9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ