Abstract: "Isospin Effect in Relativistic Collisions of Heavy Nuclei"

Proton-neutron differences appeared to be negligible or were averaged over when modeling relativistic nuclear collisions for the CERN SPS and in the early RHIC era. Some of the isospin effects were taken into account in the nuclear parton distributions (nPDF) introduced to describe nuclear modifications of the standard pQCD parton distributions (PDF). It became clear recently that the present high-precision data require a more detailed handling of these differences, well-known from lower energies. For the interpretation of the experimental results, it is important to have the uncertainties arising from treating isospin non-symmetric heavy nuclear systems under control. Therefore, in this study we investigate the effect of isospin differences on various measured quantities.