Collective behavior in small systems

• Verfasst von: Ohlson, Alice [VerfasserIn]
• Titel: Collective behavior in small systems
• Verf.angabe: Alice Ohlson
• Umfang: 8 S.
• Fussnoten: Available online 25 September 2017 ; Gesehen am 26.06.2018
• Titel Quelle: Enthalten in: Nuclear physics <Amsterdam> / A
• Jahr Quelle: 2017
• Band/Heft Quelle: 967(2017), S. 97-104
• ISSN Quelle: 1873-1554
• DOI: doi:10.1016/j.nuclphysa.2017.06.023
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1576841871

Abstract

The presence of correlations between particles significantly separated in pseudorapidity in proton-proton and proton-nucleus collisions has raised questions about whether collective effects are observed in small collision systems as well as in heavy-ion collisions. The quantification of these long-range correlations by vn coefficients is of particular interest. A selection of the latest vn measurements is presented, including results from the recent d+Au beam energy scan at RHIC where a significant non-zero v2 is measured down to low center-of-mass energies (sNN=39GeV). Results from a collision system scan - comprising p+Au, d+Au, and 3He+Au collisions - are also shown to address the role of the initial nuclear geometry in the final state anisotropy. Finally, the challenge of measuring multi-particle cumulants, particularly c2{4}, in p+p collisions is discussed, and new methods for reducing the effects of non-flow are shown to produce a more robust measurement of v2{4} in p+pcollisions.