{
  "annotation_id": "8c54d611-895e-491b-b1e5-9178e5ecefaa",
  "date_created": "2026-02-17T05:53:20.181000Z",
  "date_modified": "2026-02-17T05:53:20.181000Z",
  "file_hash": "1df76b976a907179b9cd4248ff372a4d9875a9611ef57d1f447b0ef48a9b9218",
  "private": false,
  "record": {
    "abstract": "We explain and illustrate how to compute string-loop amplitudes in Calabi-Yau orientifold compactification in the large volume limit with the help of the patch-by-patch description of string field theory. We compute the one-loop partition function of the D1-instanton in type IIB string theory compactified on an O9 orientifold of a Calabi-Yau threefold to the first order in the large volume expansion. We show that the unphysical divergence arising from a naive choice of PCOs is canceled by vertical integration. The corollaries of this result, including the universal part of the normalization of the D-instanton superpotential and the one-loop renormalization of K\\\"ahler moduli, will be presented elsewhere.",
    "arxiv_id": "2601.08973",
    "authors": [
      "Manki Kim"
    ],
    "categories": [
      "hep-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "On string loops in Calabi-Yau orientifolds in large volume",
    "url": "https://arxiv.org/abs/2601.08973",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "96ce3a8b-e2a3-417c-9600-8d336550a80d",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}