Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Several Problems in Particle Physics and Cosmology Solved in One SMASH   The Standard Model (SM) of particle physics is a big success. However, it
lacks explanations for cosmic inflation, the matter-anti-matter asymmetry of
the Universe, dark matter, neutrino oscillations, and the feebleness of CP
violation in the strong interactions. The latter may be explained by a complex
scalar field charged under a spontaneously broken global U(1) Peccei-Quinn (PQ)
symmetry. Moreover, the pseudo Nambu-Goldstone boson of this breaking -- the
axion -- may play the role of the dark matter. Furthermore, the modulus of the
PQ field is a candidate for driving inflation. If additionally three extra SM
singlet neutrinos (whose mass is induced by the PQ field) are included, the
five aforementioned problems can be addressed at once. We review the SM
extension dubbed SMASH -for SM-Axion-Seesaw-Higgs portal inflation-, discuss
its predictions and tests in astrophysics, cosmology, and laboratory
experiments. Variants of SMASH are also considered and commented on.

12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys