TY - JOUR
T1 - Higher order statistics of curvature perturbations in IFF model and its Planck constraints
AU - Fujita, Tomohiro
AU - Yokoyama, Shuichiro
PY - 2013/9
Y1 - 2013/9
N2 - We compute the power spectrum ζ and non-linear parameters fNL and τNL of the curvature perturbation induced during inflation by the electromagnetic fields in the kinetic coupling model (IFF model). By using the observational result of ζ,fNL and τNL reported by the Planck collaboration, we study the constraint on the model comprehensively. Interestingly, if the single slow-rolling inflaton is responsible for the observed ζ, the constraint from τNL is most stringent. We also find a general relationship between fNL and τNL generated in this model. Even if fNL ∼ (1), a detectable τNL can be produced.
AB - We compute the power spectrum ζ and non-linear parameters fNL and τNL of the curvature perturbation induced during inflation by the electromagnetic fields in the kinetic coupling model (IFF model). By using the observational result of ζ,fNL and τNL reported by the Planck collaboration, we study the constraint on the model comprehensively. Interestingly, if the single slow-rolling inflaton is responsible for the observed ζ, the constraint from τNL is most stringent. We also find a general relationship between fNL and τNL generated in this model. Even if fNL ∼ (1), a detectable τNL can be produced.
KW - inflation
KW - non-gaussianity
KW - primordial magnetic fields
UR - http://www.scopus.com/inward/record.url?scp=84884891564&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884891564&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2013/09/009
DO - 10.1088/1475-7516/2013/09/009
M3 - Article
AN - SCOPUS:84884891564
SN - 1475-7516
VL - 2013
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 9
M1 - 009
ER -