Peering beyond our horizon with axions
David B. Kaplan
University of Washington, Seattle
Mercredi 07/05/2008, 14:15
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
Axions with decay constant greater than 10**12 GeV are ruled out, except in an anthropic inflationary scenario, where the initial misalignment angle appears fine-tuned. Unlike many other anthropic arguments, the anthropic axion is on rather solid ground since the a priori probability distribution is known, and the astrophysical consequences for different misalignment angles can be at least be estimated. I discuss the possibility that remnants of pre-inflationary inhomogenities could possibly be detected in such scenarios.