Open Access
Table 1.
Baseline and optional late-time parameters, primordial power spectrum parameters, and slow-roll parameters.
| Parameter | Definition |
|---|---|
| ωb ≡ Ωb h2......... | Baryon density today |
| ωc ≡ Ωc h2......... | Cold dark matter density today |
| θMC......... | Approximation to the angular size of sound horizon at last scattering |
| τ......... | Optical depth to reionization |
| Neff......... | Effective number of neutrino species |
| Σmν......... | Sum of neutrino masses |
| ΩK......... | Spatial curvature parameter |
| w0......... | Dark energy equation of state parameter |
| As......... | Scalar power spectrum amplitude |
| ns......... | Scalar spectral index |
| dns/dlnk......... | Running of scalar spectral index |
| d2ns/dlnk2......... | Running of running of scalar spectral index |
| r......... | Tensor-to-scalar power ratio |
| nt......... | Tensor spectral index |
 ......... |
First Hubble slow-roll parameter |
 ......... |
(n + 1)st Hubble slow-roll parameter (n ≥ 1) |
 ......... |
First potential slow-roll parameter, where ϕ ≡ d/dϕ |
 ............... |
Second potential slow-roll parameter |
 ............ |
Third potential slow-roll parameter |
 ......... |
Fourth potential slow-roll parameter |
Notes. All primordial quantities are evaluated at a pivot scale of k* = 0.05 Mpc−1, unless otherwise stated.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.