{
  "annotation_id": "c29085dc-9fd5-45e0-ba6c-b43a9e49e31b",
  "date_created": "2026-03-02T18:00:25.476000Z",
  "date_modified": "2026-03-02T18:00:25.476000Z",
  "file_hash": "684a3792a4acda97f0406ae3ba6abeb8ffccfca13a65a1c7a1977f099c13c6e9",
  "private": false,
  "record": {
    "abstract": "The deuteron spectrum in n+p -\u003e 2 H(pi pi) at k_n = 1.88 GeV/c and theta_d =\n0^o is explained by considering a Delta Delta excitation as the dominant\nreaction mechanism for the 2 pi production. We present a new theoretical\napproach based on a coupled channel formalism which allows to include the\nresidual interaction within the intermediate Delta Delta and Delta N systems.\nThe corresponding interaction potentials V_{DeltaDelta} and V_{DeltaN} are\nadopted from a meson exchange model with pi, rho, omega, and sigma exchange\ntaken into account. The influence of the residual interaction on the deuteron\nspectrum is studied. We also predict the angular distribution of the two pions.\nIt is shown that this distribution is closely connected to the spin structure\nof the DeltaDelta excitation.",
    "arxiv_id": "nucl-th/9903064",
    "authors": [
      "C. A. Mosbacher",
      "F. Osterfeld"
    ],
    "categories": [
      "nucl-th"
    ],
    "title": "Double Delta(1232) excitation and the ABC effect in the reaction n + p   -\u003e 2H (pi pi)",
    "url": "https://arxiv.org/abs/nucl-th/9903064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "951f720b-36df-43b8-bf98-c798944fd9ae",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}