{"paper":{"title":"Line-shape and poles of the $\\psi(3770)$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Francesco Giacosa, Susana Coito","submitted_at":"2017-12-04T09:22:17Z","abstract_excerpt":"We study the non-Breit-Wigner line-shape of the $\\psi(3770)$ resonance, predominantly a $1\\ ^{3}D_{1}$ $\\bar{c}c$ state, using an unitarized effective Lagrangian approach, including the one-loop effects of the nearby thresholds $D^+D^-$ and $D^0\\bar{D}^0$. A fit of the theoretical result to the total cross-section $e^{+}e^{-}\\rightarrow D\\bar{D}$ is performed, leading to a good description of data ($\\chi^{2}/d.o.f.\\sim 1.03$). The partial cross sections $e^{+}e^{-}\\rightarrow D^0\\bar{D}^0$ and $e^{+}e^{-}\\rightarrow D^+D^-$ turn out to be separately in good agreement with the experiment. We fi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.00969","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"}