{"slug":"particle-physics-bsm","topic":"particle-physics-bsm","title":"Particle Physics & Beyond the Standard Model: State of the Field (October 2026)","summary":"This dossier covers the muon anomalous magnetic moment and the hadronic inputs that limit its Standard Model prediction, lepton flavor and flavor-anomaly tests, neutrino mass measurements and direct searches for light or long-lived new states. The main takeaway is that the 2025 Fermilab result has sharpened the muon g-2 test, while hadronic vacuum polarization remains the dominant uncertainty and no confirmed new-physics signal is established in the sources reviewed.","version":1,"published_at":"2026-10-30","updated_at":"2026-10-30","stats":{"words":4477,"citations":60,"claims":30,"timeline":16,"benchmarks":16,"open_problems":6,"key_papers":15,"glossary":14},"verification":{"status":"verified","method":"independent AI fact-check against cited sources (evidence pack + web checks); automated citation resolution","claims_checked":30,"issues_fixed":20,"verified_at":"2026-10-30"},"ai_assisted":true,"price":{"usd":"0.20","protocol":"x402","network":"eip155:84532","asset":"USDC"},"url":"https://space-kitty.com/dossiers/particle-physics-bsm","preview_url":"https://space-kitty.com/api/v1/dossiers/particle-physics-bsm/preview","purchase_url":"https://space-kitty.com/api/v1/dossiers/particle-physics-bsm","toc":[{"level":2,"text":"Executive summary","anchor":"executive-summary"},{"level":2,"text":"Background and core concepts","anchor":"background-and-core-concepts"},{"level":2,"text":"Timeline of key milestones","anchor":"timeline-of-key-milestones"},{"level":2,"text":"State of the art","anchor":"state-of-the-art"},{"level":3,"text":"Muon g-2 experiment","anchor":"muon-g-2-experiment"},{"level":3,"text":"Standard Model prediction and hadronic vacuum polarization","anchor":"standard-model-prediction-and-hadronic-vacuum-polarization"},{"level":3,"text":"Hadronic light-by-light scattering","anchor":"hadronic-light-by-light-scattering"},{"level":3,"text":"Beyond-SM explanations and their tests","anchor":"beyond-sm-explanations-and-their-tests"},{"level":3,"text":"Lepton flavor and flavor anomalies","anchor":"lepton-flavor-and-flavor-anomalies"},{"level":3,"text":"Neutrino masses and oscillations","anchor":"neutrino-masses-and-oscillations"},{"level":3,"text":"Higgs sector and collider searches","anchor":"higgs-sector-and-collider-searches"},{"level":3,"text":"Quantitative benchmarks","anchor":"quantitative-benchmarks"},{"level":2,"text":"Open problems and active debates","anchor":"open-problems-and-active-debates"},{"level":2,"text":"Major programs and players","anchor":"major-programs-and-players"},{"level":2,"text":"Outlook: what to watch (November 2026 to early 2028)","anchor":"outlook-what-to-watch-november-2026-to-early-2028"},{"level":2,"text":"Key papers","anchor":"key-papers"},{"level":2,"text":"Glossary","anchor":"glossary"}],"sample_claims":["The 2025 Fermilab measurement, using data taken in 2020 to 2023 and combined with earlier Fermilab runs, gives a_μ = 116 592 070.5(14.8) × 10^-11, a 127 ppb precision.","The experimental world average including the Brookhaven result is 116 592 071.5(14.5) × 10^-11, a 124 ppb value."],"includes":["markdown","claims","timeline","benchmarks","open_problems","key_papers","glossary","bibliography"],"citation_count":60,"how_to_buy":"GET https://space-kitty.com/api/v1/dossiers/particle-physics-bsm with an x402 client ($0.20, USDC on Base Sepolia (testnet))."}