Speaker
Description
Author: Alexey Povarov (for the STAR Collaboration)
National Research Nuclear University MEPhI, Moscow, Russia
E-mail: povarovas@gmail.com
Heavy-ion collisions create matter which is characterized by high temperature and energy density, called Quark-Gluon Plasma (QGP). One of the methods for studying the transport properties and equation of state of the created matter is the measurement of azimuthal anisotropy of particles using the Fourier expansion of the azimuthal angle with respect to the event plane. The second order Fourier coefficient $\upsilon_{2}$ is called elliptic flow and is sensitive to the pressure gradients arising in the region of overlapping nuclei. The third order coefficient $\upsilon_{3}$ (triangular flow) is sensitive to the fluctuations of nucleons in the initial state of colliding nuclei and therefore $\upsilon_{3}$ weakly depends on the collision centrality. Theoretical studies show that $\upsilon_{3}$ is more sensitive to viscous effects than $\upsilon_{2}$, making triangular flow an ideal harmonic for studying the viscosity.
This work is devoted to the study of triangular flow in a wide energy range of Au+Au collisions from the STAR experiment at RHIC ($\sqrt{s_{NN}}$ = 14.5, 19.6, 27, 39, 62.4 GeV). New measurements of triangular flow will be presented as a function of particle transverse momenta ($\text{p}_{\text{T}}$) and collision energy. Physics implications will be discussed.
| The speaker is a student or young scientist | Yes |
|---|---|
| Section | 3. Intermediate and high energies, heavy ion collisions |
