Speaker
Description
Elliptic flow ($v_{2}$) at high transverse momentum ($p_{T}$) serves as an important hard probe to study the properties of quark-gluon plasma (QGP). The non-zero high-$p_{T}$ $v_{2}$ values observed in experiments are often attributed to the path-length dependence of energy loss in the medium due to the asymmetry in the reaction zone. However, recent findings suggest a potential role for hydrodynamics, similar to its influence on low-$p_{T}$ flow generation. The origin of high-$p_{T}$ $v_{2}$ remains an open question. In this work, we offer a new perspective using a multi-phase transport model, which has succeeded in describing the overall flow and spectra in heavy-ion collisions. We investigate the evolution of high-$p_{T}$ $v_{2}$ for partons during the rescattering process and for hadrons after coalescence. By comparing model results with experimental data, we discuss potential methods to differentiate between various mechanisms, shedding new light on understanding the generation of high-$p_{T}$ $v_{2}$.
| Category | Theory |
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