Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on atmospheric charmed-meson production from IceCube   At very-high energies (100 TeV - 1 PeV), the small value of Bjorken-x
($\le10^{-3}-10^{-7}$) at which the parton distribution functions are evaluated
makes the calculation of charm quark production very difficult. The charm quark
has mass ($\sim$1.5$\pm$0.2 GeV) significantly above the $\Lambda$$_{QCD}$
scale ($\sim$200 MeV), and therefore its production is perturbatively
calculable. However, the uncertainty in the data and the calculations cannot
exclude some smaller non-perturbative contribution. To evaluate the prompt
neutrino flux, one needs to know the charm production cross-section in pN ->
c$\bar{c}$ X, and hadronization of charm particles. This contribution briefly
discusses computation of prompt neutrino flux and presents the strongest limit
on prompt neutrino flux from IceCube.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int