{"paper":{"title":"Effect of Neutrino Heating on Primordial Nucleosynthesis","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph","authors_text":"B. Fields, M.S. Turner (U. Chicago/Fermilab), S. Dodelson","submitted_at":"1992-10-31T20:40:38Z","abstract_excerpt":"We have modified the standard code for primordial nucleosynthesis to include the effect of the slight heating of neutrinos by $e^\\pm$ annihilations. There is a small, systematic change in the $^4$He yield, $\\Delta Y \\simeq +1.5\\times 10^{-4}$, which is insensitive to the value of the baryon-to-photon ratio $\\eta$ for $10^{-10}\\la \\eta \\la 10^{-9}$. We also find that the baryon-to-photon ratio decreases by about 0.5\\% less than the canonical factor of 4/11 because some of the entropy in $e^\\pm$ pairs is transferred to neutrinos. These results are in accord with recent analytical estimates."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9210007","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9210007/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}