Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitino Production After Inflation   We investigate the production of gravitinos in a cosmological background.
Gravitinos can be produced during preheating after inflation due to a combined
effect of interactions with an oscillating inflaton field and absence of
conformal invariance. In order to get insight on conformal properties of
gravitino we reformulate phenomenological supergravity in SU(2,2|1)-symmetric
way. The Planck mass and F- and D-terms appear via the gauge-fixed value of a
superfield that we call conformon. We find that in general the probability of
gravitino production is not suppressed by the small gravitational coupling.
This may lead to a copious production of gravitinos after inflation. Efficiency
of the new non-thermal mechanism of gravitino production is very sensitive to
the choice of the underlying theory. This may put strong constraints on certain
classes of inflationary models.

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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int