Constraining ${\cal N}=1$ supergravity inflation with non-minimal K\"ahler operators using $\delta N$ formalism
作者： Sayantan Choudhury
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摘要: In this paper I provide a general framework based on $\delta N$ formalism to study the features of unavoidable higher dimensional non-renormalizable Kahler operators for ${\cal N}=1$ supergravity (SUGRA) during primordial inflation from combined constraint non-Gaussianity, sound speed and CMB dipolar asymmetry as obtained recent Planck data. particular nonlinear evolution cosmological perturbations large scales which enables us compute curvature perturbation, $\zeta$, without solving exact perturbed field equations. Further non-Gaussian parameters $f_{NL}$, $\tau_{NL}$ $g_{NL}$ local type non-Gaussianities parameter, $ A_{CMB}$, using generic class sub-Planckian models induced by Hubble-induced corrections minimal supersymmetric D-flat direction where occurs at point inflection within visible sector. Hence multi parameter scan constrain non-minimal couplings appearing in within, O}(1)$, sound, $0.02\leq c_s\leq 1$, tensor scalar, $10^{-22} \leq r_{\star} 0.12$. Finally applying all these constraints will fix lower well upper bound O}(1-5)\leq f_{NL}\leq 8.5$, O}(75-150)\leq\tau_{NL}\leq 2800$ O}(17.4-34.7)\leq g_{NL}\leq 648.2$, range, $0.05\leq A_{CMB}\leq 0.09$.
arxiv.org
128.84.21.199参考文章(60)
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