{"paper":{"title":"To USR or not to USR: An effective description of two-field dynamics","arxiv_id":"2609.26754","primary_cat":"astro-ph.CO","submitted_at":"2026-09-22T17:36:21+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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$\\epsilon$.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.03,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.22,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":1.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":2,"p":0.7,"id":"s2","own":false,"role":"background","text":"Mixing with isocurvature perturbations still amplifies the curvature power spectrum.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.14,"main_claim_p":0.05,"quantitative":false,"quantitative_p":0.06,"role_probabilities":{"gap":0.01,"method":0.0,"result":0.28,"background":0.7,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":3,"p":0.84,"id":"s3","own":false,"role":"contribution","text":"We offer an alternative point of view, arguing that the inflaton still undergoes effective USR.","hedge":{"p":0.75,"label":"asserted"},"own_p":0.47,"main_claim_p":0.64,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.01,"method":0.0,"result":0.06,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.84,"interpretation":0.09}},{"i":4,"p":0.51,"id":"s4","own":true,"role":"interpretation","text":"The spectator lifts the potential by a constant amount, and the inflaton perturbations follow single-field dynamics in the lifted inflection point potential, decoupling from the spectator perturbations.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.77,"main_claim_p":0.52,"quantitative":false,"quantitative_p":0.12,"role_probabilities":{"gap":0.0,"method":0.02,"result":0.41,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.06,"interpretation":0.51}},{"i":5,"p":0.86,"id":"s5","own":true,"role":"result","text":"Mode mixing only affects the power spectrum dip, making it 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