dorsal/arxiv
View SchemaAnalysis of Subthreshold Antiproton Production in p-Nucleus and Nucleus-Nucleus Collisions in the RBUU Approach
| Authors | Stefan Teis, Wolfgang Cassing, Tomoyuki Maruyama, Ulrich Mosel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9401008 |
| URL | https://arxiv.org/abs/nucl-th/9401008 |
| DOI | 10.1103/PhysRevC.50.388 |
| Journal | Phys.Rev.C50:388-405,1994 |
Abstract
We calculate the subthreshold production of antiprotons in the Lorentz-covariant RBUU approach employing a weighted testparticle method to treat the antiproton propagation and absorption nonperturbatively. We find that the pbar differential cross sections are highly sensitive to the baryon and antiproton selfenergies in the dense baryonic environment. Adopting the baryon scalar and vector selfenergies from the empirical optical potential for proton-nucleus elastic scattering and from Dirac-Brueckner calculations at higher density rho > rho_0 we examine the differential pbar spectra as a function of the antiproton selfenergy. A detailed comparison with the available experimental data for p-nucleus and nucleus-nucleus reactions shows that the antiproton feels a moderately attractive mean-field at normal nuclear matter density rho_0 which is in line with a dispersive potential extracted from the free annihilation cross section.
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"abstract": "We calculate the subthreshold production of antiprotons in the\nLorentz-covariant RBUU approach employing a weighted testparticle method to\ntreat the antiproton propagation and absorption nonperturbatively. We find that\nthe pbar differential cross sections are highly sensitive to the baryon and\nantiproton selfenergies in the dense baryonic environment. Adopting the baryon\nscalar and vector selfenergies from the empirical optical potential for\nproton-nucleus elastic scattering and from Dirac-Brueckner calculations at\nhigher density rho \u003e rho_0 we examine the differential pbar spectra as a\nfunction of the antiproton selfenergy. A detailed comparison with the available\nexperimental data for p-nucleus and nucleus-nucleus reactions shows that the\nantiproton feels a moderately attractive mean-field at normal nuclear matter\ndensity rho_0 which is in line with a dispersive potential extracted from the\nfree annihilation cross section.",
"arxiv_id": "nucl-th/9401008",
"authors": [
"Stefan Teis",
"Wolfgang Cassing",
"Tomoyuki Maruyama",
"Ulrich Mosel"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.50.388",
"journal_ref": "Phys.Rev.C50:388-405,1994",
"title": "Analysis of Subthreshold Antiproton Production in p-Nucleus and Nucleus-Nucleus Collisions in the RBUU Approach",
"url": "https://arxiv.org/abs/nucl-th/9401008"
},
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