skip to main content

Title: Supergravity inflation with broken shift symmetry and large tensor-to-scalar ratio

We propose a class of inflation models with potential V(φ) = αφ{sup n}exp(−β{sup m}φ{sup m}). We show that such kind of inflaton potentials can be realized in supergravity theory with a small shift symmetry breaking term in the K and quot;ahler potential. We find that the models with (m = 1,n = 1), (m = 1,n = 2), (m = 2,n = 1), and (m = 2,n = 3/2) can easily accommodate the Planck results. In particular, the tensor-to-scalar ratio is larger than 0.01 in the 1σ region. Thus, these models generate the typical large field inflation, and can be tested at the future Planck and QUBIC experiments.
Authors:
 [1] ; ;  [2]
  1. State Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China (KITPC), Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190 (China)
  2. George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A and M University, College Station, TX, 77843 (United States)
Publication Date:
OSTI Identifier:
22369760
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; POTENTIALS; SCALARS; SUPERGRAVITY; SYMMETRY BREAKING; TENSORS COSMOLOGICAL INFLATION