Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lorentz invariance violation in the neutrino sector: a joint analysis
  from big bang nucleosynthesis and the cosmic microwave background   We investigate constraints on Lorentz invariance violation in the neutrino
sector from a joint analysis of big bang nucleosynthesis and the cosmic
microwave background. The effect of Lorentz invariance violation during the
epoch of big bang nucleosynthesis changes the predicted helium-4 abundance,
which influences the power spectrum of the cosmic microwave background at the
recombination epoch. In combination with the latest measurement of the
primordial helium-4 abundance, the Planck 2015 data of the cosmic microwave
background anisotropies give a strong constraint on the deformation parameter
since adding the primordial helium measurement breaks the degeneracy between
the deformation parameter and the physical dark matter density.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
19
The categories of this paper are: eess
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin