Apr 23 – 27, 2023
JMS Aster Plaza
Asia/Tokyo timezone

Longitudinal De-correlation of Anisotropic Flow at RHIC-STAR

Apr 24, 2023, 3:05 PM
25m
Medium Hall, 2nd Floor (JMS Aster Plaza)

Medium Hall, 2nd Floor

JMS Aster Plaza

Hiroshima, Japan
Oral Collective dynamics Parallel Session A

Speaker

Gaoguo Yan

Description

Studies of longitudinal de-correlation of anisotropic flow can provide unique constraints on the three-dimensional structure of the initial stages and dynamical evolution of the quark-gluon-plasma in heavy-ion collisions. Experimentally, the factorization ratio, $r_{n}(\eta)(n = 2,3)$, is used to quantify the amount of the longitudinal flow de-correlation with pseudorapidity [1-3]. With data collected by the STAR experiment at RHIC for 200 GeV Ru+Ru and Zr+Zr collisions as well as 19.6, 27, and 54.4 GeV Au+Au collisions, we will present the centrality and collision energy dependence of $r_{n}(\eta)(n = 2,3)$. These results can provide new insights into the three-dimensional modeling of the relativistic heavy-ion collisions.

[1]~The CMS Collaboration, Phys. Rev. C 92, 034911 (2015).

[2]~The ATLAS Collaboration, Eur. Phys. J. C 78, 142 (2018).

[3]~The ATLAS Collaboration, Phys. Rev. Lett. 126, 122301 (2021).

Theory / experiment Experiment
Group or collaboration name STAR Collaboration

Primary author

Presentation materials