Anomalous Transport Model Study of Heavy Ion Collisions
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Anomalous transport model study of heavy ion collisions Che-Ming Ko, Texas A&M University (Principal Investigator) Collisions of heavy ions or nuclei at relativistic energies provide the possibility to study the properties of produced quark-gluon plasma (QGP) such as how its transition to a hadronic matter behaves when its net baryon chemical potential or the difference in its quark and antiquark densities is varied as well as if parity conservation can be locally violated in such a strongly interacting matter. In the present proposal, an anomalous transport model will be developed to take into account the effects due to the magnetic and vorticity fields generated in non-central heavy ion collisions on the almost massless quarks and antiquarks, the mean-field potentials on quarks and antiquarks during the evolution of the QGP, and the mean-field potentials on hadrons during the final hadronic stage. With this comprehensive model, calculations will be carried out to study the directed flow difference between positively and negatively charged particles and their separation in the transverse plane of the reaction, the elliptic flow difference between particles and antiparticles, the spin polarization of hyperons and anti-hyperons, the effects related to the density fluctuations due to a first-order QGP to hadronic matter phase transition, and the fluctuations in the abundance of produced particles expected from the critical phenomenon as a result of the change from a first-order to a second-order phase transition. These results will be compared to experimental measurements to extract information on the properties of baryon-rich quark-gluon plasma produced in the collisions. The proposed project will impact directly on the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) as well as advance our knowledge on the phase structure of QCD and thus the properties of the strongest interaction in nature. It will further provide participating young students a broad research experience that would prepare them well for a career in either nuclear science or other areas to continue their contributions to the scientific and technological advance in our society.
