Speaker
Sanshiro for the PHENIX experiments Mizuno
(University of Tsukuba, RIKEN (JP))
Description
Azimuthal anisotropy and particle species dependence of transverse momentum distribution have been studied actively because they reveal information about the QGP generated in high energy heavy ion collisions.
From the study of elliptic event anisotropy v_{2}, we have understood that azimuthal anisotropy is generated by initial participant geometry, with a role for the QGP property $\eta$/s (the ratio of shear viscosity($\eta$) to entropy density(s)).
In recent years, higher harmonics azimuthal anisotropies v_{n$\ge$3} are in focus because they are expected to be more sensitive to initial participant geometry and $\eta$/s than will be v_{2}.
The observed similarities and differences of identified particles v_{3}, v_{4} and v_{2} will be shown and discussed.
The freeze-parameters such as freeze-out geometry and expansion velocity as well as temperature at the freeze-out will also be extracted based on the Blast-Wave model and compared with other measurements like HBT and spectra.
Author
Sanshiro for the PHENIX experiments Mizuno
(University of Tsukuba, RIKEN (JP))
