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
How the dark energy can reconcile Planck with local determination of the Hubble constant
Huang, Qing-Guo; Wang, Ke
We try to reconcile the tension between the local 2.4 % determination of Hubble constant and its global determination by Planck CMB data and BAO data through modeling the dark energy variously. We find that the chi-square is significantly reduced by
Constraints on the neutrino mass and mass hierarchy from cosmological observations
Huang, Qing-Guo; Wang, Ke; Wang, Sai
Considering the mass splitting between three active neutrinos, we represent the new constraints on the sum of neutrino mass
Cosmic constraint on massive neutrinos in viable f(R) gravity with producing Λ
Yang, Weiqiang; Wu, Yabo; Wang, Yan +2 more
Tensions between several cosmic observations were found recently, such as the inconsistent values of
Warm λ 4 ϕ 4
Videla, Nelson; Panotopoulos, Grigorios
In the present work we show that warm chaotic inflation characterized by a simple
Warm intermediate inflation in the Randall–Sundrum II model in the light of Planck 2015 and BICEP2 results: a general dissipative coefficient
Videla, Nelson; Herrera, Ramón; Olivares, Marco
A warm inflationary Universe in the Randall–Sundrum II model during intermediate inflation is studied. For this purpose, we consider the general form for the dissipative coefficient