dorsal/arxiv
View SchemaIsospin Dynamics in Heavy Ion Collisions
| Authors | M. Di Toro |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0607035 |
| URL | https://arxiv.org/abs/nucl-th/0607035 |
Abstract
Some isospin dynamics results in heavy ion collisions from low to relativistic energies obtained through transport approaches, largely inspired by David M.Brink, are reviewed. At very low energies, just above the Coulomb barrier, the stimulating implications of the prompt dipole radiation in dissipative collisions of ions with large isospin asymmetries are discussed. We pass then to the very rich phenomenology of isospin effects on heavy ion reactions at intermediate energies (few AGeV range). We show that it can allow a ``direct'' study of the covariant structure of the isovector interaction in the hadron medium. We work within a relativistic transport frame, beyond a cascade picture, consistently derived from effective Lagrangians, where isospin effects are accounted for in the mean field and collision terms. Rather sensitive observables are proposed from collective flows (``differential'' flows) and from pion/kaon production ($\pi^-/\pi^+$, $K^0/K^+$ yields). For the latter point relevant non-equilibrium effects are stressed. The possibility of the transition to a mixed hadron-quark phase, at high baryon and isospin density, is finally suggested. Some signatures could come from an expected ``neutron trapping'' effect. The importance of {\it violent} collision experiments with radioactive beams, from few AMeV to few AGeV, is stressed.
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"abstract": "Some isospin dynamics results in heavy ion collisions from low to\nrelativistic energies obtained through transport approaches, largely inspired\nby David M.Brink, are reviewed. At very low energies, just above the Coulomb\nbarrier, the stimulating implications of the prompt dipole radiation in\ndissipative collisions of ions with large isospin asymmetries are discussed. We\npass then to the very rich phenomenology of isospin effects on heavy ion\nreactions at intermediate energies (few AGeV range). We show that it can allow\na ``direct\u0027\u0027 study of the covariant structure of the isovector interaction in\nthe hadron medium. We work within a relativistic transport frame, beyond a\ncascade picture, consistently derived from effective Lagrangians, where isospin\neffects are accounted for in the mean field and collision terms. Rather\nsensitive observables are proposed from collective flows (``differential\u0027\u0027\nflows) and from pion/kaon production ($\\pi^-/\\pi^+$, $K^0/K^+$ yields). For the\nlatter point relevant non-equilibrium effects are stressed. The possibility of\nthe transition to a mixed hadron-quark phase, at high baryon and isospin\ndensity, is finally suggested. Some signatures could come from an expected\n``neutron trapping\u0027\u0027 effect. The importance of {\\it violent} collision\nexperiments with radioactive beams, from few AMeV to few AGeV, is stressed.",
"arxiv_id": "nucl-th/0607035",
"authors": [
"M. Di Toro"
],
"categories": [
"nucl-th"
],
"title": "Isospin Dynamics in Heavy Ion Collisions",
"url": "https://arxiv.org/abs/nucl-th/0607035"
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