Flow shapes and higher harmonics in anisotropic transverse collective flow

  • Danut ArgintaruEmail author
  • Calin Besliu
  • Alexandru Jipa
  • Tiberiu Esanu
  • Valerica Baban
  • Madalin Cherciu
  • Valeriu Grossu
Regular Article - Experimental Physics


In this paper we show that by using a jet-finder algorithm (the Anti- \(k_{T}\) 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 \(v_{n}\) 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 (\(\Psi_{{\rm Flowstream} 1}\)) 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.


  1. 1.
    B. Friman, C. Höhne, J. Knoll, S. Leupold, J. Randrup, R. Rapp, P. Senger (Editors), The CBM Physics Book-Compressed Baryonic Matter in Laboratory Experiments (Springer, 2011)Google Scholar
  2. 2.
    Klaus von Lanius, Preprint DESY 80/36 (1980). Google Scholar
  3. 3.
    C. Besliu et al., Eur. Phys. J. A 1, 65 (1998)ADSCrossRefGoogle Scholar
  4. 4.
    C. Besliu et al., Nucl. Phys. A 672, 446 (2000)ADSCrossRefGoogle Scholar
  5. 5.
    D. Argintaru et al., Indian J. Phys. 85, 1169 (2011)ADSCrossRefGoogle Scholar
  6. 6.
    C. Besliu, Global analysis and hydrodynamic flow in relativistic nuclear collisions, in Proceedings of the International Conference on Large Scale Collective Motion of Atomic Nuclei, Messina (Brolo), Italia, edited by G. Giardina, G. Fazio, M. Lattuada (World Scientific, 1997) pp. 307--317Google Scholar
  7. 7.
    Helen Caines, Jet Reconstruction - Understanding the backgrounds and biases is key (Yale University)
  8. 8.
    S.A. Bass et al., Prog. Part. Nucl. Phys. 41, 225 (1998)ADSCrossRefGoogle Scholar
  9. 9.
    M. Bleicher et al., J. Phys. G: Nucl. Part. Phys. 25, 1859 (1999)ADSCrossRefGoogle Scholar
  10. 10.
    You Zhou, Hadronic flow in p-Pb collisions at the LHC?, arXiv:nucl-th/1503.06986v1Google Scholar
  11. 11.
    Yu.L. Dokshitzer, Basics of Perturbative QCD (Ed. Frontières, Gif sur Yvette, 1991)Google Scholar
  12. 12.
    S.D. Ellis, Jets in Hadron-Hadron Collisions, arXiv:0712.2447v1 [hep-ph]
  13. 13.
    Gerald C. Blazey, Run II Jet Physics, arXiv:hep-ex/0005012v2
  14. 14.
    Matteo Cacciari, The anti-kt jet clustering algorithm, arXiv:0802.1189v2 [hep-ph]
  15. 15.
    Wei-Liang Qian, Decomposition of fluctuating initial conditions and flow harmonics, arXiv:1305.4673 [hep-ph]
  16. 16.
    A. Jaiswal, V. Roy, Hydrodynamics in heavy-ion collisions: recent developments, arXiv:nucl-th/1605.08694v1Google Scholar
  17. 17.
    Voloshin, Sergei A., Arthur M. Poskanzer, Raimond Snellings, Collective phenomena in non-central nuclear collisions, arXiv:0809.2949v2 [nucl-ex]
  18. 18.
    S. Voloshin, Y. Zhang, Z. Phys. C 70, 665 (1996) arXiv:hep-ph/9407282v1 CrossRefGoogle Scholar
  19. 19.
    Alice Ohlson, Phys. Rev. C 87, 034909 (2013) arXiv:1205.1172v2 [nucl-ex]ADSCrossRefGoogle Scholar
  20. 20.
    W. Reisdorf, H.G. Ritter, Annu. Rev. Nucl. Part. Sci. 47, 663 (1997)ADSCrossRefGoogle Scholar
  21. 21.
    A.M. Poskanzer, S.A. Voloshin, Phys. Rev. C 58, 1671 (1998)ADSCrossRefGoogle Scholar
  22. 22.
    Ante Bilandzic, Raimond Snellings, Sergei Voloshin, Flow analysis with cumulants: direct calculations, arXiv:nucl-ex/1010.0233v2Google Scholar
  23. 23.
    N. Borghini et al., Phys. Rev. C 63, 054906 (2001) arXiv:nucl-th/0007063 ADSCrossRefGoogle Scholar
  24. 24.
    N. Borghini et al., Phys. Rev. C 64, 054901 (2001) arXiv:nucl-th/0105040 ADSCrossRefGoogle Scholar
  25. 25.
    N. Borghini, arXiv:nucl-ex/0110016

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Danut Argintaru
    • 1
    Email author
  • Calin Besliu
    • 2
  • Alexandru Jipa
    • 2
  • Tiberiu Esanu
    • 3
  • Valerica Baban
    • 1
  • Madalin Cherciu
    • 3
  • Valeriu Grossu
    • 2
  1. 1.Constanta Maritime University, Faculty of Navigation and Naval TransportConstantaRomania
  2. 2.University of Bucharest, Faculty of PhysicsBucharestRomania
  3. 3.Institute of Space Sciences Bucharest-MagureleBucharestRomania

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