Abstract:There exists some evidence of a suppression in power in the CMB multipoles around l ∼ 20 − 30. If taken seriously, this is in tension with the simplest inflationary models driven by a single scalar field with a standard type of slowly varying potential function V (φ). Such potential functions generate a nearly scale invariant spectrum and so they do not possess the requisite suppression in power. In this paper we explore if canonical two-derivative inflation models, with a step-like feature in the potential, c… Show more
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