162311 20251017144607.0 doi 10.1103/krf3-lm4s sideral 144931 ART-2025-144931 eng Lecce, Francesca Probing axionlike particles with multimessenger observations of neutron star mergers 2025 Access copy available to the general public Unrestricted AAxion-like particles (ALPs) can be copiously produced in binary neutron star (BNS) mergers through nucleon-nucleon bremsstrahlung if the ALP-nucleon couplings ⁢ are sizable. The ALP-photon coupling ⁢ 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 observable short gamma-ray signal, in coincidence with the gravitational-wave signal produced during the merging process. This event could be detected through multimessenger observation of BNS mergers employing the synergy between gravitational-wave detectors and gamma-ray telescopes. Here, we study the sensitivity of current and proposed MeV gamma-ray experiments to detect such a signal. As an explicit example, we consider ALP couplings related as in the Kim-Shifman-Vainshtein-Zakharov axion model, and show that in this case the proposed instruments can reach a sensitivity down to ⁢ ≳few ×10−13  GeV−1 for ≲10−9  eV, comparable with the SN 1987A limit. info:eu-repo/grantAgreement/EUR/ERC-2017-AdG-788781 info:eu-repo/grantAgreement/ES/MICINN/PGC2022-126078NB-C21 info:eu-repo/grantAgreement/ES/MICINN/PID2019-108122GB-C31 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Lella, Alessandro Lucente, Giuseppe Vijayan, Vimal Bauswein, Andreas Giannotti, Maurizio Universidad de Zaragoza (orcid)0000-0001-9823-6262 Mirizzi, Alessandro 2004 038 Universidad de Zaragoza Dpto. Física Teórica Área Astronomía y Astrofísica 112, 2 (2025), 023001 [19 pp.] Phys. rev. D Physical Review D 2470-0010 1535745 http://zaguan.unizar.es/record/162311/files/texto_completo.pdf Postprint 2350732 http://zaguan.unizar.es/record/162311/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:162311 articulos driver 2025-10-17-14:15:50 ARTICLE