1999/08/31 by Luis Bento, Luı́s Bento, Zurab Berezhiani · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.62.055003
published as Phys.Rev. D62 (2000) 055003 · 11 pages, updated, to appear in PRD
arxiv created 2000/05/17 · openalex publication_date 2000/07/21 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It is shown that a Nambu-Goldstone (NG) field may be coherently produced by a large number of particles in spite of the fact that the NG bosons do not couple to flavor conserving scalar densities such as \ensuremathψ\ensuremathψ. If a flavor oscillation process takes place, the phases of the pseudoscalar or flavor-violating densities of different particles do not necessarily cancel each other. The NG boson gets a macroscopic source whenever the total (spontaneously broken) quantum number carried by the source particles suffers a net increase or decrease in time. If the lepton numbers are spontaneously broken such classical NG (Majoron) fields may significantly change the neutrino oscillation processes in stars, pushing the observational capabilities of neutrino-Majoron couplings down to m_\ensuremathν/300 GeV.