{
  "annotation_id": "81454adc-0313-405d-a765-19e3a82e74e1",
  "date_created": "2026-03-02T18:00:14.694000Z",
  "date_modified": "2026-03-02T18:00:14.694000Z",
  "file_hash": "ed36ea849ecb88620684fdf3b5e13900c6b7288615080226aedcb5e9d054fedc",
  "private": false,
  "record": {
    "abstract": "We apply nonperturbative variational techniques to a relativistic scalar\nfield theory in which heavy bosons (``nucleons\u0027\u0027) interact with light scalar\nmesons via a Yukawa coupling. Integrating out the meson field and neglecting\nthe nucleon vacuum polarization one obtains an effective action in terms of the\nheavy particle coordinates which is nonlocal in the proper time. As in\nFeynman\u0027s polaron approach we approximate this action by a retarded quadratic\naction whose parameters are to be determined variationally on the pole of the\ntwo-point function. Several ans\\\"atze for the retardation function are studied\nand for the most general case we derive a system of coupled variational\nequations. An approximate analytic solution displays the instability of the\nsystem for coupling constants beyond a critical value.",
    "arxiv_id": "nucl-th/9504002",
    "authors": [
      "R. Rosenfelder",
      "A. W. Schreiber"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevD.53.3337",
    "journal_ref": "Phys.Rev. D53 (1996) 3337-3353",
    "title": "Polaron Variational Methods In The Particle Representation Of Field   Theory : I. General Formalism",
    "url": "https://arxiv.org/abs/nucl-th/9504002"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "36a331c0-61ae-42ae-8888-a86cdf81b4db",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}