Measurements of Elliptic and Triangular Flow in High-Multiplicity He3+Au Collisions at √sNN=200 GeV

Scientific paper - Original scientific paper

• Author: A. Adare
• Author: ...
• Author: Mihael Makek
• Author: ...
• Author: L. Zou
• Collaboration: PHENIX Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We present the first measurement of elliptic (v2) and triangular (v3) flow in high-multiplicity 3He+Au collisions at √sNN=200 GeV. Two-particle correlations, where the particles have a large separation in pseudorapidity, are compared in 3He+Au and in p+p collisions and indicate that collective effects dominate the second and third Fourier components for the correlations observed in the 3He+Au system. The collective behavior is quantified in terms of elliptic v2 and triangular v3 anisotropy coefficients measured with respect to their corresponding event planes. The v2 values are comparable to those previously measured in d+Au collisions at the same nucleon-nucleon center-of-mass energy. Comparisons with various theoretical predictions are made, including to models where the hot spots created by the impact of the three 3He nucleons on the Au nucleus expand hydrodynamically to generate the triangular flow. The agreement of these models with data may indicate the formation of low-viscosity quark-gluon plasma even in these small collision systems.

• Keywords (english): QGP; Small systems; Flow; 3He+Au; 200 GeV; PHENIX
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review Letters
• Numbering: vol. 115, no. 14, 142301
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.115.142301
• URN:NBN: urn:nbn:hr:217:944807
• Publication: 2015
• Document URL: http://link.aps.org/doi/10.1103/PhysRevLett.115.142301
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2015) by the American Physical Society. Received 22 July 2015; published 28 September 2015.
• Created on: 2020-01-18 19:12:08