Axion-like particles (ALPs) can be copiously produced in binary neutron star (BNS) mergers through nucleon-nucleon bremsstrahlung if the ALP-nucleon couplings $g_{a N}$ are sizable. Furthermore, the ALP-photon coupling $g_{a\gamma}$ may trigger conversions of ultralight ALPs into photons in the magnetic fields of the merger remnant and of the Milky Way. This effect would lead to a potentially...
The Any Light Particle Search II (ALPS II), a light-shining-through-a-wall experiment located in Hamburg, Germany at the Deutsches Elektronen-Synchrotron (DESY), completed its first science runs in early 2024. The experiment principally searched for axions and axion-like particles in two data-taking stretches deemed a "scalar" run and a "pseudoscalar" run. The analysis of the data from these...