| Full text | |
| Author(s): |
Opher‚ R.
;
Pelinson‚ A.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Physical Review D; v. 70, n. 6, p. 063529, 2004. |
| Abstract | |
We investigate here models that suggest that the vacuum energy decays into cold dark matter (CDM) and show that the density fluctuation spectrum obtained from the cosmic microwave background (CMB) data together with large galaxy surveys (e.g., the Sloan Digital Sky Survey), puts strong limits on the rate of decay of the vacuum energy. CDM produced by a decaying vacuum energy would dilute the density fluctuation spectrum, created in the primordial universe and observed with large galaxy surveys at low redshifts. Our results indicate that the decay rate of the vacuum energy into CDM is extremely small. (AU) | |
| FAPESP's process: | 00/06770-2 - The cosmic microwave background radiation (CMBR) and structure formation in the universe |
| Grantee: | Reuven Opher |
| Support Opportunities: | Research Projects - Thematic Grants |