مشخصات پژوهش

خانه /Some aspects of nonminimal ...
عنوان
Some aspects of nonminimal inflation driven by a superpotential
نوع پژوهش مقاله چاپ‌شده
کلیدواژه‌ها
cosmological Inflation
چکیده
We study a nonminimal inflation which is driven by a superpotential. By adopting the Arnowitt–Deser–Misner formalism, we explore the primordial perturbations and its non-Gaussianity in this framework. By expanding the action up to the second-order in perturbations, we seek the scalar spectral index, its running and the tensor-to-scalar ratio. In this regard, we find the ranges of the nonminimal coupling and superpotential parameters which lead to the observationally viable perturbations parameters. The non- Gaussian feature in both the equilateral and orthogonal configurations in this setup, is studied by exploring the third-order action. We show that in some ranges of the nonminimal and superpotential parameters, the model predicts large non-Gaussianity. By comparing the numerical results with Planck2015 data, we test the viability of the model and find some constraints on the model’s parameters space.
پژوهشگران کوروش نوذری (نفر اول)، نرگس رشیدی تلوکی (نفر دوم)