Speaker
Victor Roy
(Central China Normal University)
Description
The event planes have played an important role in the experimental study of fluid dynamics and transport properties of the dense matter in heavy-ion collisions. Recently the correlation of different order event planes has also emerged as a promising tool to study the initial state of the high-energy nucleus-nucleus collisions. In the idealized case, event planes at different rapidities are completely correlated. However, initial parton production has significant fluctuations in the longitudinal direction as well as in the transverse direction. The longitudinal fluctuations of the initial transverse parton density can lead to fluctuations of the longitudinal azimuthal anisotropy at different rapidities and de-correlation of event planes with large rapidity gaps.
In this work, we will explore the correlations of event planes of the same harmonics with different rapidity gaps in Pb+Pb collisions at $\sqrt{s_{\rm NN}}$ =2.76 TeV using two different dynamical models that incorporate initial conditions with longitudinal fluctuations in the initial energy density. The dynamical models used in our work are AMPT and a 3+1D ideal hydrodynamic model. The initial conditions for both models are given by the HIJING model that incorporates a Monte Carlo Glauber model for multiple nucleon interactions and two-component model for particle production. Particle production from soft coherent interaction of overlapping nucleons and incoherent semi-hard parton scatterings leads to fluctuations of local energy density in the transverse as well as longitudinal direction. In addition to the event plane correlations as a function of rapidity gap we will also discuss the sensitivity of the event plane correlation to transport properties and Equation of State (EoS) of the medium.
Author
Victor Roy
(Central China Normal University)
Co-authors
Guang-You Qin
(Central China Normal University)
LongGang Pang
(Lawrence Berkeley National Laboratory)
Xin-Nian Wang
(Lawrence Berkeley National Lab. (US))
