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

• Authors: Yoshimasa Ikeda
• Languages of publication: EN

Abstracts

EN

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

EN

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

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1311-1313

Dates

published

1 - 12 - 2012

online

4 - 12 - 2012

Contributors

author

Yoshimasa Ikeda

• Riken, Hirisawa 2-1, Wako, Saitama, 351-0198, Japan

References

• [1] P. Houvinen, P.E. Kolb, U.W. Heinz, P.V. Ruuskanen, S.A. Voloshin, Phys. Lett. B 503, 58 (2001) http://dx.doi.org/10.1016/S0370-2693(01)00219-2[Crossref]
• [2] S.S. Adler et al., (PHENIX Collaboration), Phys. Rev. Lett. 91, 182301 (2003) http://dx.doi.org/10.1103/PhysRevLett.91.182301
• [3] R.J. Fries, B. Muller, C. Nonaka, S.A. Bass, Phys. Rev. Lett. 90, 202303 (2003) http://dx.doi.org/10.1103/PhysRevLett.90.202303
• [4] R.J. Fries, B. Muller, C. Nonaka, S.A. Bass, Phys. Rev. C 68, 044902 (2003) http://dx.doi.org/10.1103/PhysRevC.68.044902
• [5] E. Richardson et al., Nucl. Intsr. And Mass. A 636, 9 (2010)
• [6] T. Horano et al., Phys. Rev. C 77, 044909 (2008) http://dx.doi.org/10.1103/PhysRevC.77.044909
• [7] T. Niida, JPS 2011 autum Meeting, Sep. 21–24, 2011, Horosaki University

Identifiers

DOI

10.2478/s11534-012-0123-y