{"paper":{"title":"The Dark Side of the Periodic Table: Theory and Signatures of Nuclear Atomic Dark Matter","arxiv_id":"2611.15852","primary_cat":"hep-ph","submitted_at":"2026-11-11T19:00:01+00:00","version_compiled":"v1"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. 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mass scales and their number densities.","hedge":{"p":0.76,"label":"asserted"},"own_p":0.22,"main_claim_p":0.13,"quantitative":true,"quantitative_p":0.97,"role_probabilities":{"gap":0.01,"method":0.0,"result":0.06,"background":0.13,"limitation":0.0,"future_work":0.0,"contribution":0.08,"interpretation":0.72}},{"i":2,"p":0.52,"id":"s2","own":true,"role":"method","text":"We analyze twin nucleon freeze-out and the onset of twin Big Bang nucleosynthesis (BBN) to estimate the total naDM abundance, and determine which elements in the dark periodic table could be populated.","hedge":{"p":0.9,"label":"asserted"},"own_p":0.91,"main_claim_p":0.07,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.52,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.48,"interpretation":0.0}},{"i":3,"p":1.0,"id":"s3","own":true,"role":"result","text":"An appreciable but subdominant naDM component generally requires a fractional nucleon mass splitting near the percent level, with twin-BBN creating heavy elements up to twin carbon.","hedge":{"p":0.56,"label":"asserted"},"own_p":0.77,"main_claim_p":0.14,"quantitative":true,"quantitative_p":0.96,"role_probabilities":{"gap":0.0,"method":0.0,"result":1.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":4,"p":0.86,"id":"s4","own":true,"role":"result","text":"Strong twin neutron-proton scattering allows nearly all of the dark matter, not only the atomic sub-component, to participate in $dark~acoustic~oscillations$ (DAO) at early times, giving rise to a characteristic two-stage DAO signature that may be detected with future cosmological probes.","hedge":{"p":0.72,"label":"hedged_possibility"},"own_p":0.72,"main_claim_p":0.21,"quantitative":false,"quantitative_p":0.26,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.86,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.02,"interpretation":0.12}},{"i":5,"p":0.88,"id":"s5","own":false,"role":"interpretation","text":"Interactions between the twin and visible sectors, including the irreducible Higgs portal, make this scenario a well-motivated target for future directional direct-detection searches, and the naDM sub-component is expected to exhibit highly exotic astrophysics.","hedge":{"p":0.6,"label":"hedged_possibility"},"own_p":0.19,"main_claim_p":0.1,"quantitative":false,"quantitative_p":0.06,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.02,"background":0.0,"limitation":0.0,"future_work":0.09,"contribution":0.01,"interpretation":0.88}},{"i":6,"p":0.71,"id":"s6","own":true,"role":"contribution","text":"We outline a supersymmetric twin 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