https://doi.org/10.1140/epja/i2017-12200-3
Regular Article - Experimental Physics
Flow shapes and higher harmonics in anisotropic transverse collective flow
1
Constanta Maritime University, Faculty of Navigation and Naval Transport, Constanta, Romania
2
University of Bucharest, Faculty of Physics, Bucharest, Romania
3
Institute of Space Sciences Bucharest-Magurele, Bucharest, Romania
* e-mail: danut.argintaru@cmu-edu.eu
Received:
24
July
2016
Accepted:
23
December
2016
Published online:
16
January
2017
In this paper we show that by using a jet-finder algorithm (the Anti- one) on UrQMD/C simulated (Au+Au at 4, 10 and 15A GeV) collisions, we can identify different flow shape structures (single flow stream events, two flow streams events, three flow streams events, etc.) and order the bulk of events in equivalence flow shape classes. Considering these flow streams as the main directions of anisotropic transverse flow, we show that the Fourier coefficients
of anisotropic flow are better emphasized when we analyze the different event flow shape classes than when the events are mixed. Also, if we do not know the real orientation of the reaction plane, we can use as reference the Flow stream 1 --the main particle flow stream --orientation (
) to highlight the initial shape of the participant nuclear matter in a central to peripheral collision, and the orientation of the participant plane of order n.
© SIF, Springer-Verlag Berlin Heidelberg, 2017