标题： 介子流和反流在相对论重离子碰撞中 显示英文标题

标题： Pion flow and antiflow in relativistic heavy-ion collisions

摘要： 在AGS能量下重离子碰撞的相对论输运模型（ART）框架内，我们使用两种互补的方法研究了π介子相对于核子的横向流。 发现在中心碰撞中，π介子由于产生它们的重子共振的流而表现出较弱的流。 另一方面，在边缘碰撞中，由于靶粒子的遮蔽作用，它们表现出较弱的反流。 此外，表明π介子的流和反流主要由具有大横向动量的粒子主导。 显示英文摘要

摘要： Within the framework of a relativistic transport model (ART) for heavy-ion collisions at AGS energies, we study the transverse flow of pions with respect to that of nucleons using two complementary approaches. It is found that in central collisions pions develop a weak flow as a result of the flow of baryon resonances from which they are produced. On the other hand, they have a weak antiflow in peripheral collisions due to the shadowing of spectators. Furthermore, it is shown that both pion flow and antiflow are dominated by those with large transverse momenta.