Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Gravitino-rich Universe   The gravitino may well play an important role in cosmology, not only because
its interactions are Planck-suppressed and therefore long-lived, but also
because it is copiously produced via various processes such as particle
scatterings in thermal plasma, and (pseudo) modulus and inflaton decays. We
study a possibility that the early Universe was gravitino-rich from various
aspects. In particular, a viable cosmology is possible, if high-scale
supersymmetry is realized in nature as suggested by the recent discovery of the
standard-model like Higgs boson of mass about 125-126 GeV. We find that the
Universe can be even gravitino-dominated, in which case there will be an
entropy dilution by the gravitino decay. If the gravitino abundance is
proportional to the reheating temperature, both the maximal baryon asymmetry in
leptogenesis and the dark matter from the gravitino decay become independent of
the reheating temperature. The dark matter candidate is the Wino-like
neutralino, whose mass is suppressed compared to the anomaly-mediation
relation.

34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg