{"paper":{"title":"searches for ud\\bar{s}\\bar{b} in the chiral quark model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Jialun Ping, Xiaoyun Chen","submitted_at":"2018-07-27T09:25:21Z","abstract_excerpt":"Inspired by the report of D0 Collaboration on the state $X(5568)$ with four different flavors, a similar state, $ud\\bar{s}\\bar{b}$ is investigated in the present work. The advantage of looking for this state over the state $X(5568)$ with quark contents, $bu\\bar{d}\\bar{s}$ or $bd\\bar{u}\\bar{s}$, is that the $BK$ threshold is 270 MeV higher than that of $B_s \\pi$, and it allows a large mass region for $ud\\bar{s}\\bar{b}$ to be stable. The chiral quark model and Gaussian expansion method are employed to do the calculations of four-quark states $ud\\bar{s}\\bar{b}$ with quantum numbers $IJ^{P}$($I=0,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10505","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"}