Search Publications

Neutrino mass limits: Robust information from the power spectrum of galaxy surveys

Verde, Licia; Cuesta, Antonio J.; Niro, Viviana

We present cosmological upper limits on the sum of active neutrino masses using large-scale power spectrum data from the WiggleZ Dark Energy Survey and from the Sloan Digital Sky Survey - Data Release 7 (SDSS-DR7) sample of Luminous Red Galaxies (LRG). Combining measurements on the Cosmic Microwave Background temperature and polarisation anisotrop…

Hořava Gravity in the Effective Field Theory formalism: From cosmology to observational constraints

Frusciante, Noemi; Hu, Bin; Raveri, Marco +2 more

We consider Hořava gravity within the framework of the effective field theory (EFT) of dark energy and modified gravity. We work out a complete mapping of the theory into the EFT language for an action including all the operators which are relevant for linear perturbations with up to sixth order spatial derivatives. We then employ an updated versi…

Pre-inflationary relics in the CMB?

Gruppuso, A.; Mandolesi, N.; Natoli, P. +2 more

String Theory and Supergravity allow, in principle, to follow the transition of the inflaton from pre-inflationary fast roll to slow roll. This introduces an infrared depression in the primordial power spectrum that might have left an imprint in the CMB anisotropy, if it occurred at accessible wavelengths. We model the effect extending Λ CDM with …