{"paper":{"title":"Conservation of $\\zeta$ with radiative corrections from heavy field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-th","authors_text":"Takahiro Tanaka, Yuko Urakawa","submitted_at":"2015-10-17T01:18:57Z","abstract_excerpt":"In this paper, we address a possible impact of radiative corrections from a heavy scalar field $\\chi$ on the curvature perturbation $\\zeta$. Integrating out $\\chi$, we derive the effective action for $\\zeta$, which includes the loop corrections of the heavy field $\\chi$. When the mass of $\\chi$ is much larger than the Hubble scale $H$, the loop corrections of $\\chi$ only yield a local contribution to the effective action and hence the effective action simply gives an action for $\\zeta$ in a single field model, where, as is widely known, $\\zeta$ is conserved in time after the Hubble crossing ti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05059","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}