dorsal/arxiv
View SchemaCovariant propagator of the Rarita-Schwinger field in the nuclear medium
| Authors | C. L. Korpa, A. E. L. Dieperink |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0406044 |
| URL | https://arxiv.org/abs/nucl-th/0406044 |
| DOI | 10.1103/PhysRevC.70.015207 |
| Journal | Phys.Rev. C70 (2004) 015207 |
Abstract
A formalism for representing the fully relativistic propagator of the Rarita-Schwinger field in the nuclear medium is developed. Using a convenient basis for expanding the propagator, or the self energy, it is shown that they can be represented by 40 energy and momentum dependent quantities which can be combined into a 2x2 and a 6x6 matrix. In this way calculations reduce to matrix multiplication. Using the presented formalism the full relativistically covariant contribution of the pion-nucleon loop to the isobar self energy and propagator in isospin-symmetric spin-saturated nuclear medium is computed. Utilizing this propagator the photoabsorption cross-section on in-medium nucleons in the isobar region is calculated and the result compared with experimental data.
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"abstract": "A formalism for representing the fully relativistic propagator of the\nRarita-Schwinger field in the nuclear medium is developed. Using a convenient\nbasis for expanding the propagator, or the self energy, it is shown that they\ncan be represented by 40 energy and momentum dependent quantities which can be\ncombined into a 2x2 and a 6x6 matrix. In this way calculations reduce to matrix\nmultiplication. Using the presented formalism the full relativistically\ncovariant contribution of the pion-nucleon loop to the isobar self energy and\npropagator in isospin-symmetric spin-saturated nuclear medium is computed.\nUtilizing this propagator the photoabsorption cross-section on in-medium\nnucleons in the isobar region is calculated and the result compared with\nexperimental data.",
"arxiv_id": "nucl-th/0406044",
"authors": [
"C. L. Korpa",
"A. E. L. Dieperink"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.70.015207",
"journal_ref": "Phys.Rev. C70 (2004) 015207",
"title": "Covariant propagator of the Rarita-Schwinger field in the nuclear medium",
"url": "https://arxiv.org/abs/nucl-th/0406044"
},
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