dorsal/arxiv
View SchemaPhoton production in heavy-ion collisions at SPS energies
| Authors | G. Q. Li, G. E. Brown |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9706076 |
| URL | https://arxiv.org/abs/nucl-th/9706076 |
| DOI | 10.1016/S0375-9474(97)00808-7 |
| Journal | Nucl.Phys. A632 (1998) 153-170 |
Abstract
Single photon spectra in heavy-ion collisions at SPS energies are studied in the relativistic transport model that incorporates self-consistently the change of hadron masses in dense matter. We separate the total photon spectrum into `background' arising from the radiative decays of $\pi^0$ and $\eta$ mesons, and the `themal' one from other sources. For the latter we include contributions from radiative decays of $\rho$, $\omega$, $\eta'$, and $a_1$, radiative decays of baryon resonances, as well as two-body processes such as $\pi\pi \to \rho\gamma$ and $\pi\rho \to \pi\gamma$. It is found that more than 95% of all photons come from the decays of $\pi^0$ and $\eta$ mesons, while the thermal photons account for less than 5% of the total photon yield. The thermal photon spectra in our calculations with either free or in-medium meson masses do not exceed the upper bound set by the experimental measurment of the WA80 Collaboration.
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"abstract": "Single photon spectra in heavy-ion collisions at SPS energies are studied in\nthe relativistic transport model that incorporates self-consistently the change\nof hadron masses in dense matter. We separate the total photon spectrum into\n`background\u0027 arising from the radiative decays of $\\pi^0$ and $\\eta$ mesons,\nand the `themal\u0027 one from other sources. For the latter we include\ncontributions from radiative decays of $\\rho$, $\\omega$, $\\eta\u0027$, and $a_1$,\nradiative decays of baryon resonances, as well as two-body processes such as\n$\\pi\\pi \\to \\rho\\gamma$ and $\\pi\\rho \\to \\pi\\gamma$. It is found that more than\n95% of all photons come from the decays of $\\pi^0$ and $\\eta$ mesons, while the\nthermal photons account for less than 5% of the total photon yield. The thermal\nphoton spectra in our calculations with either free or in-medium meson masses\ndo not exceed the upper bound set by the experimental measurment of the WA80\nCollaboration.",
"arxiv_id": "nucl-th/9706076",
"authors": [
"G. Q. Li",
"G. E. Brown"
],
"categories": [
"nucl-th",
"hep-ph",
"nucl-ex"
],
"doi": "10.1016/S0375-9474(97)00808-7",
"journal_ref": "Nucl.Phys. A632 (1998) 153-170",
"title": "Photon production in heavy-ion collisions at SPS energies",
"url": "https://arxiv.org/abs/nucl-th/9706076"
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