Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryogenesis and Leptogenesis   The energy budget of the universe contains two components, dark matter and
dark energy, about which we have much to learn. One should not forget, however,
that the baryonic component presents its own questions for particle cosmology.
In the context of cosmology, baryons would have annihilated with their
antiparticles in the early universe, leaving a negligible abundance of baryons,
in disagreement with that observed. In this general lecture, delivered at the
SLAC 2004 Summer Science Institute, I provide an overview of the central issue
and the general principles behind candidate models. I also briefly discuss some
popular examples of models that are firmly rooted in particle physics.

4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an