Azimuthal Harmonics in Small and Large Collision Systems at RHIC Top Energies



Adam, J, Adamczyk, L, Adams, JR, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Alekseev, I, Anderson, DM, Aoyama, R
et al (show 344 more authors) (2019) Azimuthal Harmonics in Small and Large Collision Systems at RHIC Top Energies. PHYSICAL REVIEW LETTERS, 122 (17). 172301-.

[img] Text
PhysRevLett.122.172301.pdf - Published version

Download (531kB) | Preview

Abstract

The first (v_{1}^{fluc}), second (v_{2}), and third (v_{3}) harmonic coefficients of the azimuthal particle distribution at midrapidity are extracted for charged hadrons and studied as a function of transverse momentum (p_{T}) and mean charged particle multiplicity density ⟨N_{ch}⟩ in U+U (sqrt[s_{NN}]=193  GeV), Au+Au, Cu+Au, Cu+Cu, d+Au, and p+Au collisions at sqrt[s_{NN}]=200  GeV with the STAR detector. For the same ⟨N_{ch}⟩, the v_{1}^{fluc} and v_{3} coefficients are observed to be independent of the collision system, while v_{2} exhibits such a scaling only when normalized by the initial-state eccentricity (ϵ_{2}). The data also show that ln(v_{2}/ϵ_{2}) scales linearly with ⟨N_{ch}⟩^{-1/3}. These measurements provide insight into initial-geometry fluctuations and the role of viscous hydrodynamic attenuation on v_{n} from small to large collision systems.

Item Type: Article
Uncontrolled Keywords: STAR Collaboration
Depositing User: Symplectic Admin
Date Deposited: 04 Feb 2020 15:57
Last Modified: 19 Jan 2023 00:04
DOI: 10.1103/PhysRevLett.122.172301
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3073442