Search Publications
A search for sterile neutrinos with the latest cosmological observations
Feng, Lu; Zhang, Jing-Fei; Zhang, Xin
We report the result of a search for sterile neutrinos with the latest cosmological observations. Both cases of massless and massive sterile neutrinos are considered in the
Non-minimal derivative coupling scalar field and bulk viscous dark energy
Mostaghel, Behrang; Moshafi, Hossein; Movahed, S. M. S.
Inspired by thermodynamical dissipative phenomena, we consider bulk viscosity for dark fluid in a spatially flat two-component Universe. Our viscous dark energy model represents phantom-crossing which avoids big-rip singularity. We propose a non-minimal derivative coupling scalar field with zero potential leading to accelerated expansion of the Un…
CMB anomalies and the effects of local features of the inflaton potential
Gariazzo, Stefano; Cadavid, Alexander Gallego; Romano, Antonio Enea
Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales
Lorentz invariance violation in the neutrino sector: a joint analysis from big bang nucleosynthesis and the cosmic microwave background
Cai, Rong-Gen; Guo, Zong-Kuan; Dai, Wei-Ming +1 more
We investigate constraints on Lorentz invariance violation in the neutrino sector from a joint analysis of big bang nucleosynthesis and the cosmic microwave background. The effect of Lorentz invariance violation during the epoch of big bang nucleosynthesis changes the predicted helium-4 abundance, which influences the power spectrum of the cosmic …
Probing gravitational non-minimal coupling with dark energy surveys
Geng, Chao-Qiang; Lee, Chung-Chi; Wu, Yi-Peng
We investigate observational constraints on a specific one-parameter extension to the minimal quintessence model, where the quintessence field acquires a quadratic coupling to the scalar curvature through a coupling constant