Search Publications

The tilt of primordial gravitational waves spectra from BICEP2

Cheng, Cheng; Huang, Qing-Guo

In this paper we constrain the tilt of the spectrum of primordial gravitational waves from Background Imaging of Cosmic Extragalactic Polarization (BICEP2) data only. We find r = 0.21_-0.10^+0.04 and n_t = -0.06_-0.23^+0.25 (at 68% C.L.) which implies that a scale-invariant primordial gravitational…

Take up the challenge for a single field inflation after BICEP2

Feng, Chao-Jun; Li, Xin-Zhou

The measurement of the tensor-to-scalar ratio r shows a very powerful constraint to theoretical inflation models through the detection of B-mode. In this paper, we propose a single inflation model with infinity power series potential called the Infinity Power Series (IPS) inflation model, which is well consistent with latest observations from Plan…

Constraints on dark matter annihilation and its equation of state after Planck data

Xu, Lixin

In this paper, the annihilation of dark matter (DM) f_dɛ₀ with nonzero equation of state (EoS) w_dm was studied by using the currently available cosmic observations which include geometric and dynamic measurements. The constrained results show they are anti-correlated and are w dm = 0.000390_{-0.000753<…}