{"paper":{"title":"Cosmology of self-interacting ultralight dark matter: simultaneous shifts in the Hubble constant and structure growth","arxiv_id":"2610.29582","primary_cat":"astro-ph.CO","submitted_at":"2026-10-21T11:25:20+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. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v1","sentences":[{"i":0,"p":0.92,"id":"s0","own":true,"role":"contribution","text":"We study the cosmology of self-interacting ultralight dark matter.","hedge":{"p":0.7,"label":"asserted"},"own_p":0.87,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.02,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.08,"limitation":0.0,"future_work":0.0,"contribution":0.92,"interpretation":0.0}},{"i":1,"p":0.34,"id":"s1","own":false,"role":"contribution","text":"The scalar field evolves from an early Hubble-frozen phase to a quartic-dominated radiation-like phase and finally to a quadratic matter-like phase.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.45,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.25,"result":0.16,"background":0.24,"limitation":0.0,"future_work":0.0,"contribution":0.34,"interpretation":0.01}},{"i":2,"p":0.47,"id":"s2","own":true,"role":"interpretation","text":"The intermediate phase increases the pre-recombination expansion rate and reduces the sound horizon, while the late phase allows the same field to contribute to dark matter.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.52,"main_claim_p":0.06,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.05,"result":0.27,"background":0.06,"limitation":0.0,"future_work":0.0,"contribution":0.15,"interpretation":0.47}},{"i":3,"p":0.99,"id":"s3","own":true,"role":"method","text":"We implement the background and linear perturbations of a mixed cold-dark-matter and ultralight-dark-matter cosmology in CLASS.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.94,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.04,"role_probabilities":{"gap":0.0,"method":0.99,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.01,"interpretation":0.0}},{"i":4,"p":1.0,"id":"s4","own":true,"role":"result","text":"For $m=10^{-22}\\,{\\rm eV}$ and $\\tilde m\\simeq1\\,{\\rm eV}$, increasing the ultralight-dark-matter fraction raises the fixed-$\\theta_*$ value of $H_0$, lowers the late-time clustering amplitude, strengthens the scale-dependent matter-power suppression, and produces a smooth CMB-temperature residual reaching about $9\\%$ for the largest fraction considered.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.91,"main_claim_p":0.3,"quantitative":true,"quantitative_p":0.99,"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":5,"p":0.99,"id":"s5","own":true,"role":"interpretation","text":"The model therefore generates simultaneous background and growth shifts in the directions relevant to the Hubble and structure-growth tensions.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.82,"main_claim_p":0.75,"quantitative":false,"quantitative_p":0.06,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.01,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.99}},{"i":6,"p":0.67,"id":"s6","own":false,"role":"future_work","text":"Establishing whether these shifts improve a joint fit requires a likelihood-level observational 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