1993/02/18 by N. Kaiser, Robert Malaney, R. A. Malaney +2 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevlett.71.1128
published as Phys.Rev.Lett. 71 (1993) 1128-1131 · 7 pages, 3 figures included as uuencoded file, CITA/93/7
arxiv created 1993/02/18 · openalex publication_date 1993/08/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently, Madsen has argued that relativistic decays of massive neutrinos into lighter fermions and bosons may lead, via thermalization, to the formation of a Bose condensate. If correct, this could generate mixed hot and cold dark matter, with important consequences for structure formation. From a detailed study of such decays, we find that mixed dark matter can indeed form, but by a new physical mechanism; for a wide range of masses and decay times, we find that stimulated emission of bosons dominates the decay. This phenomenon can best be described as a neutrino laser, pumped by quark confinement. We discuss the implications for structure formation and the dark-matter problem.