Influence of the in-medium pion dispersion relation in heavy ion collisions

Abstract

We investigate the influence of medium corrections to the pion dispersion relation on the pion dynamics in intermediate energy heavy ion collisions. To do so a pion potential is extracted from the in-medium dispersion relation and used in QMD calculations and thus we take care of both, real and imaginary part of the pion optical potential. The potentials are determined from different sources, i.e. from the $\Delta$--hole model and from phenomenological approaches. Depending on the strength of the potential a reduction of the anti-correlation of pion and nucleon flow in non-central collisions is observed as well as an enhancement of the high energetic yield in transverse pion spectra. A comparison to experiments, in particular to $p_t$-spectra for the reaction Ca+Ca at 1 GeV/nucleon and the pion in-plane flow in Ne+Pb collisions at 800 MeV/nucleon, generally favours a weak potential.

arXiv comment25 pages, using REVTeX, 6 postscript figures; replaced by published version

References in corpus (1)

• Azimuthal correlations of pions in relativistic heavy ion collisions at 1 GeV/nucl.

Cited by in corpus (24)

• Kaon production in heavy ion reactions at intermediate energies
• Probing high-density behavior of symmetry energy from pion emission in heavy-ion collisions
• Comparison of heavy-ion transport simulations: Collision integral with pions and $\Delta$ resonances in a box
• Nuclear in-medium effects and collective flows in heavy-ion collisions at intermediate energies
• Energy dependence of pion in-medium effects on π^-/π^+ ratio in heavy-ion collisions
• In-medium dependence and Coulomb effects of the pion production in heavy ion collisions
• Origin of subthreshold K^+ production in heavy ion collisions
• Effects of a phase transition on two-pion interferometry in heavy-ion collisions at $\sqrt{s_{\mathrm{NN}}}=2.4-7.7$ GeV
• Isospin-dependent pion in-medium effects on charged pion ratio in heavy ion collisions
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Pion Production in Heavy-ion Collisions in the 1 A GeV region
• Role of isospin dependent mean field in pion production in heavy ion reactions
• Collective flows of pions in Au+Au collisions at energies 1.0 and 1.5 GeV/nucleon
• Nuclear fragmentation and charge-exchange reactions induced by pions in the $\Delta$-resonance region
• Relativistic quantum transport theory of hadronic matter: the coupled nucleon, delta and pion system
• Preequilibrium particle emissions and in-medium effects on the pion production in heavy-ion collisions
• Radial flow of kaon mesons in heavy ion reactions
• Off-shell pions in Boltzmann-Uehling-Uhlenbeck transport theory
• Effects of Spin-Isospin Modes in Transport Simulations
• Transport Simulations with Pi and Delta In-Medium Properties
• D' Production in Heavy Ion Collisions
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions
• Exploring the nuclear pion dispersion relation through the anomalous coupling of photon to photon and neutral pion