Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lepton-pair Cerenkov radiation emitted by tachyonic neutrinos:
  Lorentz-covariant approach and IceCube data   Current experiments do not exclude the possibility that one or more neutrinos
are very slightly superluminal or that they have a very small tachyonic mass.
Important bounds on the size of a hypothetical tachyonic neutrino mass term are
set by lepton pair Cerenkov radiation (LPCR), i.e., by the decay channel nu ->
e^+ e^- nu which proceeds via a virtual Z0 boson. Here, we use a
Lorentz-invariant dispersion relation which leads to very tight constraints on
the tachyonic mass of neutrinos; we also calculate decay and energy loss rates.
A possible cutoff seen in the IceCube neutrino spectrum for E_nu > 2 PeV, due
to the potential onset of LPCR, is discussed.

19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th