TY - JOUR
T1 - Polynomial chaotic inflation in supergravity revisited
AU - Nakayama, Kazunori
AU - Takahashi, Fuminobu
AU - Yanagida, Tsutomu T.
N1 - Funding Information:
We thank Andrei Linde for pointing out the issues of the polynomial chaotic inflation model. This work was supported by the Grant-in-Aid for Scientific Research on Innovative Areas (No. 23104008 [F.T.], No. 26104009 [T.T.Y.]), Scientific Research (A) (No. 26247042 [K.N., F.T.]), Scientific Research (B) (No. 26287039 [F.T., T.T.Y.]), Young Scientists (B) (No. 26800121 [K.N.], No. 24740135 [F.T.]), and Inoue Foundation for Science [F.T.]. This work was also supported by World Premier International Center Initiative (WPI Program), MEXT , Japan.
PY - 2014/10/7
Y1 - 2014/10/7
N2 - We revisit a polynomial chaotic inflation model in supergravity which we proposed soon after the Planck first data release. Recently some issues have been raised in Ref. [12], concerning the validity of our polynomial chaotic inflation model. We study the inflaton dynamics in detail, and confirm that the inflaton potential is very well approximated by a polynomial potential for the parameters of our interest in any practical sense, and in particular, the spectral index and the tensor-to-scalar ratio can be estimated by single-field approximation. This justifies our analysis of the polynomial chaotic inflation in supergravity.
AB - We revisit a polynomial chaotic inflation model in supergravity which we proposed soon after the Planck first data release. Recently some issues have been raised in Ref. [12], concerning the validity of our polynomial chaotic inflation model. We study the inflaton dynamics in detail, and confirm that the inflaton potential is very well approximated by a polynomial potential for the parameters of our interest in any practical sense, and in particular, the spectral index and the tensor-to-scalar ratio can be estimated by single-field approximation. This justifies our analysis of the polynomial chaotic inflation in supergravity.
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U2 - 10.1016/j.physletb.2014.08.043
DO - 10.1016/j.physletb.2014.08.043
M3 - Article
AN - SCOPUS:84907381369
SN - 0370-2693
VL - 737
SP - 151
EP - 155
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -