{"paper":{"title":"Isospin in $B$ Decays and the $(B^0 \\bar B^0)/(B^+ B^-)$ Production Ratio","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Jonathan L. Rosner, Michael Gronau, Yuval Grossman","submitted_at":"2006-01-17T18:48:47Z","abstract_excerpt":"Methods are proposed for measuring the ratio $R^{+/0} = \\Gamma(\\Upsilon(4S) \\to B^+ B^-)/$ $\\Gamma(\\Upsilon(4S) \\to \\bo \\ob)$ without assuming isospin invariance in exclusive hadronic decays such as $B \\to J/\\psi K$. The validity of isospin invariance in various B decays is discussed. Isospin violations are expected to be especially small in inclusive semileptonic decays, so that $\\Gamma(B^+ \\to X_c^0 \\ell^+ \\nu_\\ell) = \\Gamma(B^0 \\to X_c^- \\ell^+ \\nu_\\ell)$ is expected to hold at the sub-percent level. Suggestions are made for utilizing this relation. The accuracy of a ``double-tag'' method f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0601136","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/0601136/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"}