2006/11/30 by Hooman Davoudiasl, Saswat Sarangi, Sash Sarangi +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevlett.99.161302
published as Phys.Rev.Lett.99:161302,2007 · 4 pages. Abstract changed. New results and conclusion added
arxiv created 2007/05/24 · openalex publication_date 2007/10/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We consider the phenomenological consequences of sampling multiple vacua during inflation motivated by an enormous landscape. A generic consequence of this sampling is the formation of domain walls, characterized by the scale \ensuremathμ of the barriers that partition the accessed vacua. We find that the success of big bang nucleosynthesis (BBN) implies \ensuremathμ\ensuremath\gtrsim10 TeV, as long as the sampled vacua have a nondegeneracy larger than O(MeV4). Otherwise, the walls will dominate and eventually form black holes that must reheat the universe sufficiently for BBN to take place; in this case, we obtain \ensuremathμ\ensuremath\gtrsim10^\ensuremath-5MP. These black holes are not allowed to survive and contribute to cosmic dark matter density.