2004/08/14 by Frank Wilczek, Wilczek, Frank · 4 citations
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Semantic Web and Ontologies #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0408167
Solicited article for the book ``Universe or Multiverse?'', ed. B. Carr, based in part on a talk at the Anthropic Workshop, Cambridge University, June 2001. v2 additional references, minor typos corrected
openalex publication_date 2004/08/14 · arxiv created 2004/09/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
If inflation occurs after the breaking of Peccei-Quinn symmetry then large values of the breaking scale F, which are forbidden in conventional axion cosmology, are permitted, provided that we inhabit a region of the Multiverse where the initial misalignment is small. Regions having approximately this initial misalignment may occupy a small volume of the Multiverse, but they contain a large fraction of potential observers. This scenario has many consequences, including a possible explanation of the approximate equality of dark and baryon matter densities.