Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryogenesis via Hawking-like Radiation in the FRW Space-time   We present a phenomenological model for baryogenesis based on particle
creation in the Friedman-Robertson-Walker (FRW) spacetime. This study is a
continuation of our proposal that Hawking-like radiation in FRW space-time
explains several physical aspects of the early Universe including inflation. In
this model we study a coupling between the FRW space-time, in the form of the
derivative of the Ricci scalar, and the $B-L$ current, $J^{\mu} _{B-L}$, which
leads to a different chemical potential between baryons and anti-baryons
resulting in an excess of baryons over anti-baryons with the right order of
magnitude. In this model the generation of baryon asymmetry, in principle,
occurs over the entire history of the Universe starting from the beginning of
the radiation phase. However, in practice, almost the entire contribution to
the baryon asymmetry only comes from the very beginning of the Universe and is
negligible thereafter. There is a free parameter in our model which can be
interpreted as defining the boundary between the unknown quantum gravity regime
and the inflation/baryogenesis regime covered by our model. When this parameter
is adjusted to give the observed value of baryon asymmetry we get a higher than
usual energy scale for our inflation model which however may be in line with
the GUT scale for inflation in view of the BICEP2 and Planck results. In
addition our model provides the correct temperature for the CMB photons at the
time of decoupling.

23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph