dorsal/arxiv
View SchemaProbing Hadronic Polarizations with Dilepton Anisotropies
| Authors | E. L. Bratkovskaya, W. Cassing, U. Mosel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9605025 |
| URL | https://arxiv.org/abs/nucl-th/9605025 |
| Journal | Z.Phys. C75 (1997) 119-126 |
Abstract
We investigate the production of $e^+e^-$ pairs from $p + Be$ and nucleus-nucleus collisions from 2 GeV/A to 200 GeV/A within a covariant transport approach and focus on the dilepton angular anisotropies as a function of the dilepton invariant mass. Whereas the low mass regime yields information about the Dalitz decays of the $\Delta, \eta$ and $\omega$, above M $\approx $0.5 GeV the angular anisotropies provide additional information about the $\pi^+\pi^- \to \rho^0 \to e^+e^-$ channel in the medium. The anisotropy coefficient is found to change its sign for M $>$ 0.5 GeV in case of nucleus-nucleus reactions when increasing the bombarding energy from 2 GeV/A to 200 GeV/A which sheds some light on the $\pi \pi \to \rho$ dynamics.
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"abstract": "We investigate the production of $e^+e^-$ pairs from $p + Be$ and\nnucleus-nucleus collisions from 2 GeV/A to 200 GeV/A within a covariant\ntransport approach and focus on the dilepton angular anisotropies as a function\nof the dilepton invariant mass. Whereas the low mass regime yields information\nabout the Dalitz decays of the $\\Delta, \\eta$ and $\\omega$, above M $\\approx\n$0.5 GeV the angular anisotropies provide additional information about the\n$\\pi^+\\pi^- \\to \\rho^0 \\to e^+e^-$ channel in the medium. The anisotropy\ncoefficient is found to change its sign for M $\u003e$ 0.5 GeV in case of\nnucleus-nucleus reactions when increasing the bombarding energy from 2 GeV/A to\n200 GeV/A which sheds some light on the $\\pi \\pi \\to \\rho$ dynamics.",
"arxiv_id": "nucl-th/9605025",
"authors": [
"E. L. Bratkovskaya",
"W. Cassing",
"U. Mosel"
],
"categories": [
"nucl-th"
],
"journal_ref": "Z.Phys. C75 (1997) 119-126",
"title": "Probing Hadronic Polarizations with Dilepton Anisotropies",
"url": "https://arxiv.org/abs/nucl-th/9605025"
},
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