NuSym23, XIth International Symposium on Nuclear Symmetry Energy

Rapidity dependence of directed flow ($v_1$) and elliptic flow ($v_2$) were analyzed for various particles, including proton, deuteron, triton, ${}^3\mathrm{He}$, and ${}^4\mathrm{He}$ observed in collisions involving ${}^{132}\mathrm{Sn}+{}^{124}\mathrm{Sn}$ and ${}^{108}\mathrm{Sn}+{}^{112}\mathrm{Sn}$ collisions at 270 $\mathrm{MeV}/\mathrm{u}$.
The flow was larger for heavier charged particles, i.e.,
the slope of $v_1$ ($v_{11}$) and the negative $v_2$ at the mid-rapidity ($v_{20}$) were enhanced for the heavier charged particles.
To understand the experimental data, we compared them with AMD calculations which explicitly consider the cluster correlation.
Two types of momentum-dependent mean field potential were utilized.
AMD calculations explain the increasing flow trend for the heavier particles, but a close comparison shows that the mass dependence is stronger in experimental data.
The sensitivity to the density dependence of the symmetry energy and
the system dependence is also examined.