{"paper":{"title":"Dispersive treatment of $K_S\\to\\gamma\\gamma$ and $K_S\\to\\gamma\\ell^+\\ell^-$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Gilberto Colangelo, Lewis C. Tunstall, Ramon Stucki","submitted_at":"2016-09-12T20:00:11Z","abstract_excerpt":"We analyse the rare kaon decays $K_S \\to \\gamma\\gamma$ and $K_S \\to \\gamma\\ell^+\\ell^-$ $(\\ell = e \\mbox{ or } \\mu)$ in a dispersive framework in which the weak Hamiltonian carries momentum. Our analysis extends predictions from lowest order $SU(3)_L\\times SU(3)_R$ chiral perturbation theory ($\\chi$PT$_3$) to fully account for effects from final-state interactions, and is free from ambiguities associated with extrapolating the kaon off-shell. Given input from $K_S \\to \\pi\\pi$ and $\\gamma\\gamma^{(*)}\\to\\pi\\pi$, we solve the once-subtracted dispersion relations numerically to predict the rates f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.03574","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}