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The extracted values of V_ud are also found to be compatible with current determinations within these uncertainties."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That the quantum Monte Carlo sampling with the chosen phenomenological and chiral Hamiltonians fully captures isospin-symmetry-breaking effects without sizable systematic bias from finite model-space truncations or from the treatment of electromagnetic and charge-dependent forces."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Ab initio QMC calculations yield δ_C ≈ 0.15–0.25% for ¹⁰C superallowed beta decay, consistent across phenomenological and chiral interactions within 34–65% relative uncertainties."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Ab initio quantum Monte Carlo calculations determine the isospin-symmetry-breaking correction δ_C for the superallowed beta decay of 10C to be 0.15-0.25%."}],"snapshot_sha256":"5f9f9de3362f16b7c61b2223b5b724090bd65d414012e4c645b1079893e86836"},"formal_canon":{"evidence_count":2,"snapshot_sha256":"37b5a7f8a94b17cb18f9c51f6f3b349e65189865b392b93385d99ed5e22c46fe"},"paper":{"abstract_excerpt":"We perform an ab initio quantum Monte Carlo calculation of the isospin-symmetry-breaking correction $\\delta_C$ to the superallowed $\\beta$ decay of $^{10}{\\rm C}$. 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