{"paper":{"title":"Estimates of $m_d - m_u$ and $\\langle\\bar{d}d\\rangle - \\langle\\bar{u}u\\rangle$ from QCD sum rules for $D$ and $D^{\\ast}$ isospin mass differences","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"B.L. Ioffe, V.L. Eletsky","submitted_at":"1993-02-24T11:03:07Z","abstract_excerpt":"The recent experimental data on $D^{+}-D^{0}$ and $D^{\\ast\\, +}-D^{\\ast\\,0}$ mass differences are used as inputs in the QCD sum rules to obtain new estimates on the mass difference of light quarks and on the difference of their condensates: $m_d -m_u =3\\pm 1\\, MeV$, $\\langle\\bar{d}d\\rangle -\\langle\\bar{u}u\\rangle = -(2.5\\pm 1)\\cdot 10^{-3}\\langle\\bar{u}u\\rangle$ (at a standard normalization point, $\\mu = 0.5\\, GeV$)."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9302299","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"}