{"paper":{"title":"Constraints on axion-like particles from ultra-high-energy observations of M87 with the HAWC observatory","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"A. Andr\\'es, A. Bernal, A. Carrami\\~nana, A. Gonzalez Mu\\~noz, A. Iriarte, A.J. Smith, A. Lara, A.L. Longinotti, A. Nayerhoda, A. Pratts, A. Rodriguez Parra, A. Sandoval, C. Alvarez, C. de Le\\'on, C.D. Rho, C. Espinoza, D. Avila Rojas, D. Huang, D. Kieda, D. Rosa-Gonz\\'alez, D. Salazar-Gallegos, E. Anita-Rangel, E. Belmont-Moreno, E. De la Fuente, E.G. P\\'erez-P\\'erez, E. Moreno, E. Ponce, E. Varela, F. Carre\\'on, F. Garfias, F. Hueyotl-Zahuantitla, G. Luis-Raya, H.A. Ayala Solares, H. Le\\'on Vargas, H. Mart\\'inez-Huerta, H. Wu, H. Zhou, I. Herzog, I.J. Watson, I. Torres, J.A. Garc\\'ia-Gonz\\'alez, J.A. Gonz\\'alez, J.A. Goodman, J.A. Matthews, J.A. Morales-Soto, J.C. Arteaga-Vel\\'azquez, J.C. D\\'iaz-V\\'elez, J. Cotzomi, J. Gyeong, J. Lee, J. Mart\\'inez-Castro, J.P. Harding, J. Serna-Franco, J.T. Linnemann, K. Malone, K.S. Caballero-Mora, K. Tollefson, L. Nellen, L. Olivera-Nieto, L. Villase\\~nor, M.A. DuVernois, M. Araya, M.M. Gonz\\'alez, M. Mostaf\\'a, M. Najafi, M. Osorio-Archila, M. Roth, M. Schneider, M.U. Nisa, N. Di Lalla, N. Fraija, N. Ghosh, N. Omodei, O. Martinez, O. Tibolla, P. Bangale, P. Desiati, P.E. Mir\\'on-Enriquez, P. Miranda-Romagnoli, R. Alfaro, R. Babu, R. Diaz Hernandez, R. Noriega-Papaqui, R. Torres-Escobedo, R.W. Springer, S. Casanova, S. Fraija, S. Kaufmann, S. Yu, T. Capistr\\'an, T. Ergin, U. Cotti, W.H. Lee, X. Wang, X. Zhang, Y. P\\'erez Araujo, Y. Son, Z. Wang","submitted_at":"2026-06-09T01:29:30Z","abstract_excerpt":"In this work, we perform an indirect search for axion-like particles (ALPs) through their hypothesized mixing with photons in the presence of magnetic fields. ALPs are a well-motivated dark-matter candidate class, and the photon-ALP conversion mechanism provides a unique channel to constrain their mass and coupling constant using very-high-energy gamma-ray observations. The photon-ALP mixing could alter the observed gamma-ray spectrum from extragalactic sources by effectively reducing the apparent attenuation due to extragalactic-background-light absorption. We analyze 7.5 years of data from t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10292","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.10292/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}