{"paper":{"title":"Chiral Symmetry and Charmonium Decays to Two Pseudoscalars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"Ilaria Jemos (Lund), Johan Bijnens","submitted_at":"2011-09-23T11:11:51Z","abstract_excerpt":"We apply hard pion Chiral Perturbation Theory to charmonium decays to $\\pi\\pi$, $KK$ and $\\eta\\eta$. We first discuss why we expect to be able to provide results for the chiral logarithms in $\\chi_{c0}$ and $\\chi_{c2}$ decays to two pseudoscalars while for the decays from $J/\\psi$, $\\psi(nS)$ and $\\chi_{c1}$ no simple prediction is possible. The leading chiral logarithm turns out to be absent for $\\chi_{c0},\\chi_{c2}\\to PP$. This result is true for all fully chiral singlet states of spin zero and two."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5033","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":""},"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"}