Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generically large nongaussianity in small multifield inflation   If forthcoming measurements of cosmic photon polarization restrict the
primordial tensor-to-scalar ratio to $r < 0.01$, small field inflation will be
a principal candidate for the origin of the universe. Here we show that small
multifield inflation, without the hybrid mechanism, typically results in large
squeezed nongaussianity. Small multifield potentials contain multiple flat
field directions, often identified with the gauge invariant field directions in
supersymmetric potentials. We find that unless these field directions have
equal slopes, large nongaussianity arises. After identifying relevant
differences between large and small two-field potentials, we demonstrate that
the latter naturally fulfill the Byrnes-Choi-Hall large nongaussianity
conditions. Computations of the primordial power spectrum, spectral index, and
squeezed bispectrum, reveal that small two-field models which otherwise match
observed primordial perturbations, produce excludably large nongaussianity if
the inflatons' field directions have unequal slopes.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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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: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg