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Open Physics

formerly Central European Journal of Physics

Editor-in-Chief: Seidel, Sally

Managing Editor: Lesna-Szreter, Paulina

IMPACT FACTOR 2017: 0.755
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Volume 10, Issue 6


Volume 13 (2015)

Understanding of radial and elliptic expansion with quark number scaling and blast wave model in 200 GeV Au+Au at RHIC-PHENIX

Yoshimasa Ikeda
Published Online: 2012-12-04 | DOI: https://doi.org/10.2478/s11534-012-0123-y


Measurement of azimuthal anisotropy is one of the most important study because of its relation to the initial stage. Especially, the elliptical anisotropy which is measured as the second coefficient of Fourier expansion of particle azimuthal distribution is believed to carry the information about the initial geometrical anisotropy. It seems the identified hadron v 2 depends on the number of quark contents of the hadron. The experimental result of quark number scaling of v 2 suggests quark level collectivity in the hot dense matter and quark coalescence mechanism to form hadron from quark matter via quark-gluon phase transition. The measured v 2 and p T spectra are analyzed with various assumptions based on the blast wave model in order to understand the freeze-out temperature and collective flow after the system expansion.

Keywords: collective flow; quark deconfinement; quark-gluon plasma production; phase transitions

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About the article

Published Online: 2012-12-04

Published in Print: 2012-12-01

Citation Information: Open Physics, Volume 10, Issue 6, Pages 1311–1313, ISSN (Online) 2391-5471, DOI: https://doi.org/10.2478/s11534-012-0123-y.

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© 2012 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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