We revisit the limit on very light axion-like particles (ALPs) from the absence of gamma rays coincidental with the neutrino burst from SN1987A. We use updated supernova simulations, modern models for the magnetic field inside the Galaxy, and a Primakoff cross section which takes into account proton-degeneracy and mass-reduction effects. We finally give an updated exclusion plot for the electromagnetic coupling of sub-eV ALPs, comparing our new bound with other limits as well as with future ALP searches.
@article{arxiv.1410.4404,
title = {A fresh look on the limit on ultralight axion-like particles from SN1987A},
author = {Alexandre Payez},
journal= {arXiv preprint arXiv:1410.4404},
year = {2014}
}
Comments
Contributed to the 10th Patras Workshop on Axions, WIMPs and WISPs, CERN, June 29 to July 4, 2014