1206.3306 (Peter Adshead et al.)

Non-Gaussianity and Excursion Set Theory: Halo Bias    [PDF]

Peter Adshead, Eric J. Baxter, Scott Dodelson, Adam Lidz

We study the impact of primordial non-Gaussianity generated during inflation on the bias of halos using excursion set theory. We recapture the familiar result that the bias scales as $k^{-2}$ on large scales but explicitly identify the approximations that go into this conclusion and the corrections to it. We solve the more complicated problem of non-spherical halos, for which the collapse threshold is scale dependent.

View original: http://arxiv.org/abs/1206.3306