dorsal/arxiv
View SchemaEffect of nucleon structure variation on the longitudinal response function
| Authors | K. Saito, K. Tsushima, A. W. Thomas |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9904055 |
| URL | https://arxiv.org/abs/nucl-th/9904055 |
| DOI | 10.1016/S0370-2693(99)01087-4 |
| Journal | Phys.Lett.B465:27-35,1999 |
Abstract
Using the quark-meson coupling (QMC) model, we study the longitudinal response function for quasielastic electron scattering from nuclear matter. In QMC the coupling constant between the scalar ($\sigma$) meson and the nucleon is expected to decrease with increasing nuclear density, because of the self-consistent modification of the structure of the nucleon. The reduction of the coupling constant then leads to a smaller contribution from relativistic RPA than in the Walecka model. However, since the electromagnetic form factors of the in-medium nucleon are modified at the same time, the longitudinal response function and the Coulomb sum are reduced by a total of about 20% in comparison with the Hartree contribution. We find that the relativistic RPA and the nucleon structure variation both contribute about fifty-fifty to the reduction of the longitudinal response.
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"abstract": "Using the quark-meson coupling (QMC) model, we study the longitudinal\nresponse function for quasielastic electron scattering from nuclear matter. In\nQMC the coupling constant between the scalar ($\\sigma$) meson and the nucleon\nis expected to decrease with increasing nuclear density, because of the\nself-consistent modification of the structure of the nucleon. The reduction of\nthe coupling constant then leads to a smaller contribution from relativistic\nRPA than in the Walecka model. However, since the electromagnetic form factors\nof the in-medium nucleon are modified at the same time, the longitudinal\nresponse function and the Coulomb sum are reduced by a total of about 20% in\ncomparison with the Hartree contribution. We find that the relativistic RPA and\nthe nucleon structure variation both contribute about fifty-fifty to the\nreduction of the longitudinal response.",
"arxiv_id": "nucl-th/9904055",
"authors": [
"K. Saito",
"K. Tsushima",
"A. W. Thomas"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0370-2693(99)01087-4",
"journal_ref": "Phys.Lett.B465:27-35,1999",
"title": "Effect of nucleon structure variation on the longitudinal response function",
"url": "https://arxiv.org/abs/nucl-th/9904055"
},
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