Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Varying leptonic chemical potentials and spatial variation of primordial
  deuterium at high z   We try to explain the spatial variation of primordial deuterium suggested by
some observations by varying leptonic chemical potentials. The variation of the
latter may take place in some scenarios of leptogenesis. The model predicts a
large mass fraction of $^4 He$ (35-60%) and $^7 Li$ (up to $10^{-9}$) in
deuterium-rich regions. Because of lepton family symmetry, the angular
variations of cosmic microwave background radiation can be sufficiently small
although still observable in future measurements.

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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: alg-geom
1
The categories of this paper are: cs