dorsal/arxiv
View SchemaA Microscopic Calculation of Photoabsorption Cross Sections on Protons and Nuclei
| Authors | R. Rapp, M. Urban, M. Buballa, J. Wambach |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9709008 |
| URL | https://arxiv.org/abs/nucl-th/9709008 |
| DOI | 10.1016/S0370-2693(97)01360-9 |
| Journal | Phys.Lett.B417:1-6,1998 |
Abstract
A recently developed model for $\rho$-meson propagation in dense hadronic matter is applied to total photoabsorption cross sections in $\gamma$-proton and $\gamma$-nucleus reactions. Within the vector dominance model the photon coupling to the virtual pion cloud of the nucleon, two-body meson-exchange currents, as well as $\gamma$-nucleon resonances are included. Whereas the $\gamma p$ reaction is determined by the low-density limit of the model, higher orders in the nuclear density are important to correctly account for the experimental spectra observed on both light and heavy nuclei over a wide range of photon energies, including the region below the pion threshold. In connection with soft dilepton spectra in high-energy heavy-ion collisions we emphasize the importance of photoabsorption to further constrain the parameters of the model.
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"abstract": "A recently developed model for $\\rho$-meson propagation in dense hadronic\nmatter is applied to total photoabsorption cross sections in $\\gamma$-proton\nand $\\gamma$-nucleus reactions. Within the vector dominance model the photon\ncoupling to the virtual pion cloud of the nucleon, two-body meson-exchange\ncurrents, as well as $\\gamma$-nucleon resonances are included. Whereas the\n$\\gamma p$ reaction is determined by the low-density limit of the model, higher\norders in the nuclear density are important to correctly account for the\nexperimental spectra observed on both light and heavy nuclei over a wide range\nof photon energies, including the region below the pion threshold. In\nconnection with soft dilepton spectra in high-energy heavy-ion collisions we\nemphasize the importance of photoabsorption to further constrain the parameters\nof the model.",
"arxiv_id": "nucl-th/9709008",
"authors": [
"R. Rapp",
"M. Urban",
"M. Buballa",
"J. Wambach"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(97)01360-9",
"journal_ref": "Phys.Lett.B417:1-6,1998",
"title": "A Microscopic Calculation of Photoabsorption Cross Sections on Protons and Nuclei",
"url": "https://arxiv.org/abs/nucl-th/9709008"
},
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