{"paper":{"title":"$\\eta^{(\\prime)}$-meson twist-2 distribution amplitude within QCD sum rule approach and its application to the semi-leptonic decay $ D_s^+ \\to\\eta^{(\\prime)}\\ell^+ \\nu_\\ell$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Dan-Dan Hu, Hai-Bing Fu, Long Zeng, Tao Zhong, Wei Cheng, Xing-Gang Wu","submitted_at":"2021-02-10T07:24:49Z","abstract_excerpt":"In this paper, we make a detailed discussion on the $\\eta$ and $\\eta'$-meson leading-twist light-cone distribution amplitude $\\phi_{2;\\eta^{(\\prime)}}(u,\\mu)$ by using QCD sum rules approach under the background field theory. Taking both the non-perturbative condensates up to dimension-six and NLO QCD corrections to the perturbative part, its first three moments $\\langle\\xi^n_{2;\\eta^{(\\prime)}}\\rangle|_{\\mu_0} $ with $n = (2,4,6)$ at initial scale $\\mu_0 = 1$ GeV can be determined. e.g. $\\langle\\xi_{2;\\eta}^2\\rangle|_{\\mu_0} =0.231_{-0.013}^{+0.010}$, $\\langle\\xi_{2;\\eta}^4 \\rangle|_{\\mu_0} ="},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.05293","kind":"arxiv","version":3},"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/2102.05293/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"}