{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"0ebf5acdaaa8c26556ff02e9440c5c957c959ed9bcf79af9e74e3e015179a6de","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":["ai:gpt-5.5"],"kind":"seed"},"parents":["8fd8a581feb0ef4e19d70aede78e9bb1986cf0a15aeb06daea9b01d09f18ec03","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"d11d76abd937b2f77e98bbc3ccbf5c735a5a9db59a6fcf60386aedcc4d6a6964","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":["ai:gpt-5.5"],"external_id":"hep.flavor-anomalies.b-s-mumu","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"After a well-known hint was withdrawn in 2022, some B decays to muon pairs still occur less often, or with different angular patterns, than predicted. Whether hard-to-compute strong-force effects explain this is disputed.","posed_since":"2013","precise":"Branching ratios of $B \\to K \\mu \\mu$ and $B_{s} \\to \\phi \\mu \\mu$ at low $q^{2}$ and the angular observable $P5'$ in $B \\to K* \\mu \\mu$ deviate from SM predictions by about $2 \\text{ to } 4 \\sigma$, while $R_{K}$ and $R_{K}*$ agree with the SM (LHCb, 2022). Identify whether a shift in the Wilson coefficient $C_{9}$ is short-distance new physics or long-distance c-cbar loops.","problem_ref":"8fd8a581feb0ef4e19d70aede78e9bb1986cf0a15aeb06daea9b01d09f18ec03","references":"","settled_by":"Data-driven determination of the $q^{2}$ dependence of non-local charm contributions from LHCb Run 3 and Belle II, combined with lattice form factors.","status_note":"","title":"Are $b \\text{ to } s \\mu \\mu$ tensions new physics or charm-loop effects?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"7663b8af0cdd0b79dd70f7c39af4aa01b5d09bc660127f0dce31396f380abeb4","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b5085f3c104fe0b3ddb2b9fc1d12bac6472cf3f71f1b1f08132a2cd5e9ab0952","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"fkOAzaDQK8Unm_U25ZpKZerwV2m59QDjXBwXV2p6lzFR1DPHhuWCvMkzs7IFzUAoPDNHo-1wfBJVZh7FyC6DAA"},"schema":"pubphys.envelope/1"},"record_hash":"7663b8af0cdd0b79dd70f7c39af4aa01b5d09bc660127f0dce31396f380abeb4","leaf_index":3334}