Er-Qin Wang

Transverse momentum distributions of strange hadrons produced in nucleus?nucleus collisions at

The transverse momentum distributions of strange particles produced in high-energy collisions are analyzed by the thermalized cylinder model. We present a detailed comparison with the experimental data of Cu+Cu and Au+Au collisions at = 62.4 and 200 GeV. It is found that the calculated results are in agreement with the experimental data. The excitation degree of an emission source on the central axis of the cylinder increases obviously with increasing collision centrality and incident energy. There is no obvious change in the excitation degree of the emission source in the side-surface of the cylinder.

\sqrt{\mathrm{\it s_{NN}}}=62.4

We investigate the dependence of elliptic flows v2 on transverse momentum PT for charged and strange hadrons produced in Cu?Cu collisions by using a multi-source thermal model, which includes the interaction contribution of the emission sources. The magnitude of the expansion is denoted by a expansion factor k. Our calculated results are approximately in agreement with the experimental data in Cu?Cu collisions at = 62.4 and 200 GeV, measured by the STAR Collaboration. It is found that the expansion factor increases linearly with the impact parameter from the most central (0?10%) to mid-peripheral (40?50%) collisions.

and 200 GeV

In high energy collisions, one usually needs to give a conversion between the particle rapidity and pseudorapidity distributions. Currently, two equivalent conversion formulas are used in experimental and theoretical analyses. An investigation in the present work shows that the two conversions are incomplete. Then, we give a revision on the current conversion between the particle rapidity and pseudorapidity distributions.

Transverse momentum dependence of charged and strange hadron elliptic flows in Cu?Cu collisions

We investigate the dependence of elliptic flows v2 on transverse momentum PT for charged hadrons produced in nucleus-nucleus collisions at high energy by using a multi-source thermal model, where the contribution of source interactions is considered. Our calculated results are approximately in agreement with the experimental data over a wider PT range from the PHENIX and ALICE collaborations. It is found that the expansion factor increases linearly with the impact parameter from most central (0–5%) to mid-peripheral (35–40%) collisions.

On Current Conversion between Particle Rapidity and Pseudorapidity Distributions in High Energy Collisions

We investigate the dependence of elliptic flows v2 on transverse momentum PT for charged hadrons produced in nucleus-nucleus collisions at high energy by using a multi-source thermal model, where the contribution of source interactions is considered. Our calculated results are approximately in agreement with the experimental data over a wider PT range from the PHENIX and ALICE collaborations. It is found that the expansion factor increases linearly with the impact parameter from most central (0–5%) to mid-peripheral (35–40%) collisions.