Scale-dependent bias from multiple-field inflation

Dias, Mafalda, Raquel, Ribeiro H and Seery, David (2013) Scale-dependent bias from multiple-field inflation. Physical Review D, 87. p. 107301. ISSN 1550-7998

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We provide a formula for the scaling behaviour of the inflationary bispectrum in the 'squeezed' limit where one momentum becomes much smaller than the other two. This determines the scaling of the halo bias at low wavenumber and will be an important observable for the next generation of galaxy surveys. Our formula allows it to be predicted for the first time for a generic inflationary model with multiple light, canonically-normalized scalar fields.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy > QB0980 Cosmogony. Cosmology
Depositing User: Mafalda Dias
Date Deposited: 23 May 2014 09:29
Last Modified: 02 Jul 2019 20:07

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