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

  • (STAR Collaboration)

研究成果: Article同行評審

58   連結會在新分頁中打開 引文 斯高帕斯(Scopus)

摘要

The first (v1fluc), second (v2), and third (v3) harmonic coefficients of the azimuthal particle distribution at midrapidity are extracted for charged hadrons and studied as a function of transverse momentum (pT) and mean charged particle multiplicity density Nch in U+U (sNN=193 GeV), Au+Au, Cu+Au, Cu+Cu, d+Au, and p+Au collisions at sNN=200 GeV with the STAR detector. For the same Nch, the v1fluc and v3 coefficients are observed to be independent of the collision system, while v2 exhibits such a scaling only when normalized by the initial-state eccentricity (μ2). The data also show that ln(v2/μ2) scales linearly with Nch-1/3. These measurements provide insight into initial-geometry fluctuations and the role of viscous hydrodynamic attenuation on vn from small to large collision systems.

原文English
文章編號172301
期刊Physical review letters
122
發行號17
DOIs
出版狀態Published - 2019 4月 30

All Science Journal Classification (ASJC) codes

  • 一般物理與天文學

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