166 citations · 1.4k across the 41 of their papers we have counts for
4 papers · 1 filter
Measuring nonlocal Lagrangian peak bias
Matteo Biagetti, Kwan Chuen Chan, Vincent Desjacques +1
We investigate nonlocal Lagrangian bias contributions involving gradients of the linear density field, for which we have predictions from the excursion set peak formalism. We begin…
Enhancing Inflationary Tensor Modes through Spectator Fields
Matteo Biagetti, Matteo Fasiello, Antonio Riotto
We show that a large contribution to tensor modes during inflation can be generated by a spectator scalar field with speed of sound lower than unity.
Symmetries of Vector Perturbations during the de Sitter Epoch
Matteo Biagetti, Alex Kehagias, Enrico Morgante +2
We analyze the class of models where a suitable coupling between the inflaton field and the vector field gives rise to scale-invariant vector perturbations. We exploit the fact tha…
Testing the Running of non-Gaussianity through the CMB mu-distortion and the Halo Bias
Matteo Biagetti, Hideki Perrier, Antonio Riotto +1
The primordial non-Gaussianity parameters fNL and tauNL may be scale-dependent. We investigate the capability of future measurements of the CMB mu-distortion, which is very sensiti…