1996/12/23 by W. Keil, Wolfgang Keil, Hans-Thomas Janka +6 · 143 citations
Physics and Astronomy · #Axion #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Limit (mathematics) #Neutrino #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Saturation (graph theory) #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.56.2419
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 56(4), 2419-2432 (American Physical Society) · 32 latex pages, 13 postscript figures included, uses revtex.sty, submitted to Physical Review D
arxiv created 1996/12/23 · openalex publication_date 1997/08/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We reexamine the very stringent limit on the axion mass based on the strength and duration of the neutrino signal from SN 1987A, in the light of new measurements of the axial-vector coupling strength of nucleons, possible suppression of axion emission due to many-body effects, and additional emission processes involving pions. The suppression of axion emission due to nucleon spin fluctuations induced by many-body effects degrades previous limits by a factor of about 2. Emission processes involving thermal pions can strengthen the limits by a factor of 3--4 within a perturbative treatment that neglects saturation of nucleon spin fluctuations. Inclusion of saturation effects, however, tends to make the limits less dependent on pion abundances. The resulting upper limit to the axion mass also depends on the precise couplings of the axion and ranges from 0.5\ifmmode×\else\texttimes\fi10^\ensuremath-3 eV to 6\ifmmode×\else\texttimes\fi10^\ensuremath-3 eV, consistent with previous results.