PoS - Proceedings of Science
Volume 421 - Neutrino Oscillation Workshop (NOW2022) - Session V. Particle Physics in the Cosmos
Constraints on ALPs from astrophysical probes
G. Lucente
Full text: pdf
Pre-published on: December 28, 2022
Published on:
Abstract
Axion-like particles (ALPs), with masses up to a few 100 keV and coupled with photons can be efficiently produced in the Horizontal Branch (HB) stars in Globular Clusters, contributing to a significant energy-loss. For sufficiently large values of the ALP mass and coupling to photons, a significant fraction of ALPs decay inside the star, leading to an efficient energy transfer. Using a new ballistic recipe that covers both the energy-loss and energy-transfer regimes, the first dedicated simulation of GC stars including the ALP energy transfer has been performed, constraining ALPs with $m_a \lesssim 0.4$ MeV and $g_{a\gamma} \lesssim 10^{-5}$ GeV$^{-1}$. The combination of this bound with constraints from beam-dump experiments and SN 1987A covers a wide region of the heavy ALP parameter space. In this talk I will describe how astrophysical sources, such as HB stars and supernovae, can be used to constrain ALPs coupled with photons, with masses lower than a few 100 MeV.
DOI: https://doi.org/10.22323/1.421.0098
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.