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Signatures of Primordial non-Gaussianities in the Matter Power-Spectrum and Bispectrum: the Time-RG Approach
Nicola Bartolo, J. P. Beltran Almeida, Sabino Matarrese +2
We apply the time-renormalization group approach to study the effect of primordial non-Gaussianities in the non-linear evolution of cosmological dark matter density perturbations.…
The Halo Mass Function from Excursion Set Theory with a Non-Gaussian Trispectrum
Michele Maggiore, Antonio Riotto
A sizeable level of non-Gaussianity in the primordial cosmological perturbations may be induced by a large trispectrum, i.e. by a large connected four-point correlation function. W…
Anisotropic Trispectrum of Curvature Perturbations Induced by Primordial Non-Abelian Vector Fields
Nicola Bartolo, Emanuela Dimastrogiovanni, Sabino Matarrese +1
Motivated by the interest in models of the early universe where statistical isotropy is broken and can be revealed in cosmological observations, we consider an SU(2) theory of gaug…
The Probable Fate of the Standard Model
J. Ellis, J. R. Espinosa, G. F. Giudice +2
Extrapolating the Standard Model to high scales using the renormalisation group, three possibilities arise, depending on the mass of the Higgs boson: if the Higgs mass is large eno…
Anisotropic bispectrum of curvature perturbations from primordial non-Abelian vector fields
Nicola Bartolo, Emanuela Dimastrogiovanni, Sabino Matarrese +1
We consider a primordial SU(2) vector multiplet during inflation in models where quantum fluctuations of vector fields are involved in producing the curvature perturbation. Recentl…
Cosmological Perturbations in Hořava-Lifshitz Gravity
Xian Gao, Yi Wang, R. Brandenberger +1
We study cosmological perturbations in Hořava-Lifshitz Gravity. We consider scalar metric fluctuations about a homogeneous and isotropic space-time. Starting from the most general…