论文标题
Boltzmann-Maxwell方程中的重型离子碰撞中依赖电荷的定向流动
Charge-dependent directed flows in heavy-ion collisions by Boltzmann-Maxwell equations
论文作者
论文摘要
我们已经计算了定向流量$ v_ {1} $和与电荷依赖的定向流量$ΔV_{1} $用于pions and Proton in au+au collisions in $ \ sqrt {s_ {nn}} = 200 $ gev，通过求解bolted boltzmann-maxwell exconsisterys self-consissississ，sqrt {s_ {nn}} = 200 $ gev。我们的数值结果表明，亲质和质子的$ v_ {1} $在正速度区域中都是负的，并且具有相似的行为和大小。相比之下，我们发现pions和质子的$ΔV_{1} $中的行为截然不同。差异在于质子的$ΔV_{1} $主要来自培养基的压力梯度，而对Pions的$ΔV_{1} $的主要贡献来自电磁场。我们的结果表明，电场的效果将略微超过磁场的效果，并导致pions的$ΔV_{1} $的小负斜率
We have calculated the directed flow $v_{1}$ and charge-dependent directed flow $Δv_{1}$ for pions and protons in Au+Au collisions at $\sqrt{s_{NN}}=200$GeV by solving the coupled Boltzmann-Maxwell equations self-consistently. Our numerical results show that $v_{1}$ for pions and protons are all negative in the positive mid rapidity region and have similar behavior and magnitude. In contrast we find a quite different behavior in $Δv_{1}$ for pions and protons. The difference lies in that $Δv_{1}$ for protons mainly comes from pressure gradients of the medium, while the dominant contribution to $Δv_{1}$ for pions is from electromagnetic fields. Our results indicate that the effect of the electric field will slightly exceed that of the magnetic and lead to a small negative slope of $Δv_{1}$ for pions
