{"paper":{"title":"The longitudinal leading-twist distribution amplitude of $J/\\psi$ meson within background field theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Hai-Bing Fu, Long Zeng, Tao Zhong, Wei Cheng, Xing-Gang Wu","submitted_at":"2018-01-21T14:45:39Z","abstract_excerpt":"We make a detailed study on the $J/\\psi$ meson longitudinal leading-twist distribution amplitude $\\phi_{2;J/\\psi}^\\|$ by using the QCD sum rules within the background field theory. By keeping all the non-perturbative condensates up to dimension-six, we obtain accurate QCD sum rules for the moments $\\langle\\xi_{n;J/\\psi}^\\|\\rangle$. The first three ones are $\\langle\\xi_{2;J/\\psi}^\\|\\rangle=0.083(12)$, $\\langle\\xi_{4;J/\\psi}^\\|\\rangle=0.015(5)$ and $\\langle\\xi_{6;J/\\psi}^\\|\\rangle=0.003(2)$, leading to a single peaked behavior for $\\phi_{2;J/\\psi}^\\|$ which is sharper than the previous ones arou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06832","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"}