Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: F-Term Hybrid Inflation Followed by Modular Inflation   We consider the well motivated model of the (standard) supersymmetric F-term
hybrid inflation (FHI) which can be realized close to the grand unification
scale. The predicted scalar spectral index $n_s$ cannot be smaller than 0.98
and can exceed unity including corrections from minimal supergravity, if the
number of e-foldings corresponding to the pivot scale $k_*=0.002/{\rm Mpc}$ is
around 50. These results are marginally consistent with the fitting of the
Wilkinson microwave anisotropy probe data by the standard power-law
cosmological model with cold dark matter and a cosmological constant. However,
$n_s$ can be reduced by restricting the number of e-foldings that $k_*$
suffered during FHI. The additional e-foldings required for solving the horizon
and flatness problems can be generated by a subsequent stage of fast-roll
[slow-roll] modular inflation realized by a string modulus which does [does
not] acquire effective mass before the onset of modular inflation.

17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics