Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-07-17
Nucl.Phys.A782:267-274,2007
Physics
Nuclear Physics
Nuclear Theory
8 pages, 4 figures, espcrc1 (latex) style. Conf. "Perspectives in Hadronic Physics", ICTP Trieste May 2006, Nucl.Phys. A, to a
Scientific paper
10.1016/j.nuclphysa.2006.10.028
We show that the phenomenology of isospin effects on heavy ion reactions at intermediate energies (few AGeV range) is extremely rich and 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.
Colonna Maria
Ferini Graziella
Gaitanos Theodoros
Greco Vincenzo
Toro Massimo Di
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