Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube   A diffuse flux of astrophysical neutrinos above $100\,\mathrm{TeV}$ has been
observed at the IceCube Neutrino Observatory. Here we extend this analysis to
probe the astrophysical flux down to $35\,\mathrm{TeV}$ and analyze its flavor
composition by classifying events as showers or tracks. Taking advantage of
lower atmospheric backgrounds for shower-like events, we obtain a shower-biased
sample containing 129 showers and 8 tracks collected in three years from 2010
to 2013. We demonstrate consistency with the
$(f_e:f_{\mu}:f_\tau)_\oplus\approx(1:1:1)_\oplus$ flavor ratio at Earth
commonly expected from the averaged oscillations of neutrinos produced by pion
decay in distant astrophysical sources. Limits are placed on non-standard
flavor compositions that cannot be produced by averaged neutrino oscillations
but could arise in exotic physics scenarios. A maximally track-like composition
of $(0:1:0)_\oplus$ is excluded at $3.3\sigma$, and a purely shower-like
composition of $(1:0:0)_\oplus$ is excluded at $2.3\sigma$.

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The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th