{"paper":{"title":"$QQ^{\\prime} \\bar u \\bar d$ bound state in the Bethe-Salpeter equation approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"B.-S. Zou, G.-Q. Feng, X.-H. Guo","submitted_at":"2013-09-30T12:11:18Z","abstract_excerpt":"In the heavy quark limit, we establish the Bethe-Salpeter equations for the ground state $QQ^{\\prime} \\bar u \\bar d$ containing one heavy diquark $QQ^{\\prime}$ ($Q, Q^{\\prime}=b$ or $c$) and one light antidiquark $\\bar u \\bar d$. We solve the Bethe-Salpeter equations numerically in the covariant instantaneous approximations with the kernels containing a scalar confinement term and a one-gluon-exchange term. Numerical solutions for the Bethe-Salpeter wave functions are presented. The results show that the masses of $bb \\bar u \\bar d$, $bc \\bar u \\bar d$, and $cc \\bar u \\bar d$ bound states lie "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7813","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"}