TY - JOUR
T1 - Two-field analysis of no-scale supergravity inflation
AU - Ellis, John
AU - García, Marcos A.G.
AU - Nanopoulos, Dimitri V.
AU - Olive, Keith A.
N1 - Publisher Copyright:
© 2015, Institute of Physics Publishing. All rights reserved.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Since the building-blocks of supersymmetric models include chiral superfields containing pairs of effective scalar fields, a two-field approach is particularly appropriate for models of inflation based on supergravity. In this paper, we generalize the two-field analysis of the inflationary power spectrum to supergravity models with arbitrary Kähler potential. We show how two-field effects in the context of no-scale supergravity can alter the model predictions for the scalar spectral index ns and the tensor-to-scalar ratio r, yielding results that interpolate between the Planck-friendly Starobinsky model and BICEP2-friendly predictions. In particular, we show that two-field effects in a chaotic no-scale inflation model with a quadratic potential are capable of reducing r to very small values 蠑0.1. We also calculate the non-Gaussianity measure fNL, finding that is well below the current experimental sensitivity.
AB - Since the building-blocks of supersymmetric models include chiral superfields containing pairs of effective scalar fields, a two-field approach is particularly appropriate for models of inflation based on supergravity. In this paper, we generalize the two-field analysis of the inflationary power spectrum to supergravity models with arbitrary Kähler potential. We show how two-field effects in the context of no-scale supergravity can alter the model predictions for the scalar spectral index ns and the tensor-to-scalar ratio r, yielding results that interpolate between the Planck-friendly Starobinsky model and BICEP2-friendly predictions. In particular, we show that two-field effects in a chaotic no-scale inflation model with a quadratic potential are capable of reducing r to very small values 蠑0.1. We also calculate the non-Gaussianity measure fNL, finding that is well below the current experimental sensitivity.
KW - inflation
KW - particle physics - cosmology connection
KW - supersymmetry and cosmology
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U2 - 10.1088/1475-7516/2015/01/010
DO - 10.1088/1475-7516/2015/01/010
M3 - Article
AN - SCOPUS:84921024350
SN - 1475-7516
VL - 2015
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 1
M1 - 010
ER -