dorsal/arxiv
View SchemaDilepton anisotropy from $p + Be$ and $Ca + Ca$ collisions at BEVALAC energies
| Authors | E. L. Bratkovskaya, W. Cassing, U. Mosel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9601018 |
| URL | https://arxiv.org/abs/nucl-th/9601018 |
| DOI | 10.1016/0370-2693(96)00302-4 |
| Journal | Phys.Lett. B376 (1996) 12-18 |
Abstract
A full calculation of lepton-pair angular characteristics is carried out for $e^+e^-$ pairs created in $p + Be$ and $Ca + Ca$ collisions from 1.0 to 2.1 GeV/A. It is demonstrated that the dilepton decay anisotropy depends sensitively on the different sources and may be used for their disentangling. Due to the dominance of the $\eta$-and $\Delta$-Dalitz decays and only a small anisotropy coefficient for $\pi^+\pi^-$ annihilation, the expected anisotropy coefficients show a decrease with invariant mass of the dilepton pair and change only moderately when comparing $p + Be$ and $Ca + Ca$ reactions at the same bombarding energy.
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"abstract": "A full calculation of lepton-pair angular characteristics is carried out for\n$e^+e^-$ pairs created in $p + Be$ and $Ca + Ca$ collisions from 1.0 to 2.1\nGeV/A. It is demonstrated that the dilepton decay anisotropy depends\nsensitively on the different sources and may be used for their disentangling.\nDue to the dominance of the $\\eta$-and $\\Delta$-Dalitz decays and only a small\nanisotropy coefficient for $\\pi^+\\pi^-$ annihilation, the expected anisotropy\ncoefficients show a decrease with invariant mass of the dilepton pair and\nchange only moderately when comparing $p + Be$ and $Ca + Ca$ reactions at the\nsame bombarding energy.",
"arxiv_id": "nucl-th/9601018",
"authors": [
"E. L. Bratkovskaya",
"W. Cassing",
"U. Mosel"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0370-2693(96)00302-4",
"journal_ref": "Phys.Lett. B376 (1996) 12-18",
"title": "Dilepton anisotropy from $p + Be$ and $Ca + Ca$ collisions at BEVALAC energies",
"url": "https://arxiv.org/abs/nucl-th/9601018"
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