Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryogenesis from an Earlier Phase Transition   We explore the possibility that the observed baryon asymmetry of the universe
is the result of an earlier phase transition in which an extended gauge sector
breaks down into the $SU(3)_C \times SU(2)_L \times U(1)_Y$ of the Standard
Model. Our proto-typical example is the Topflavor model, in which there is a
separate $SU(2)_1$ for the third generation from the $SU(2)_2$ felt by the
first two generations. We show that the breakdown of $SU(2)_1 \times SU(2)_2
\to SU(2)_L$ results in lepton number being asymmetrically distributed
through-out the three families, and provided the SM electroweak phase
transition is {\em not} strongly first order, results in a non-zero baryon
number, which for parameter choices that can be explored at the LHC, may
explain the observed baryon asymmetry.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg