ICPAQGP-2010

5-10 December 2010

6th International Conference on Physics and Astrophysics of Quark Gluon Plasma (ICPAQGP 2010)

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The elliptic flow of Multi-strange hadrons in sqrt{s_{NN}} = 200 GeV Au + Au collisions at STAR

Content:

The measurement of event anisotropy, $v_{2}$, provides a powerful tool for studying the properties of hot and dense medium created in high-energy nuclear collisions. The important discoveries of partonic collectivity and the process for hadronization - quark coalescence were obtained through a systematic analysis of the $v_{2}$ for 200 GeV Au+Au collisions at RHIC [1]. However, early dynamic information might be masked by later hadronic rescatterings. Multi-strange hadrons ($\phi$, $\Xi$ and $\Omega$) with their large mass and presumably small hadronic cross sections should be less sensitive to hadronic rescattering in the later stage of the collisions and therefore a good probe of the early stage of the collision. We will present the measurement of Multi-strange hadron elliptic flow in Au + Au collisions at sqrt{s_{NN}} = 200 GeV. The number of quark scaling for multi-strange hadron v2 at intermediate pT is observed for $\phi$ and $\Omega$. We will also discuss about the possible breaking of mass ordering of phi meson at low pT. The results from hybrid model approaches (ideal-hydro + hadronic-transport) will be compared with the data . [1] B. I. Abelev et al., (STAR Collaboration), Phys. Rev. {\bf C 77}, 054901 (2008).

Collaboration:

the STAR collaboration

Id:

101

Place:

Room: Main Auditorium

Starting date:

--not yet scheduled--

Duration:

00'

Primary Authors:

Dr. SHI, Shusu (Huazhong Normal University)

Presenters:

Dr. SHI, Shusu