The Lyman-alpha Forest as a tool for disentangling non-Gaussianities
Abstract
Detection of primordial non-Gaussianity will give us an unprecedented detail of the physics of inflation. As observational probes are now exploring new expanses of the inflationary landscape, it is crucial to distinguish and disentangle effects of various non-Gaussianities beyond fNL. In this work, we calculate the effects of non-Gaussianities parametrized by fNL and the cubic-order gNL, on the Lyman-alpha-forest flux measurements. We give the expressions of the bias due to fNL and gNL, which can be deduced from accurate measurements of the transmitted flux. We show how these two effects can be cleanly disentangled via a flux transformation, which also keeps the error in check.
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