论文标题
$λ$的$λ$从重合离子碰撞和中子星的超子拼图中
Directed flow of $Λ$ from heavy-ion collisions and hyperon puzzle of neutron stars
论文作者
论文摘要
我们通过重型离子碰撞的$λ$指示流了手性有效场理论（$χ$ eft）的$λ$潜力。我们在相对论量子分子动力学的矢量电位版本中实施了从$χ$ eft获得的$λ$潜力。我们发现，假设弱动量依赖性重现了$λ$的定向流量，该$χ$ eft获得了$χ$ eft的电位。虽然$λ$定向流对电势的密度依赖性不太敏感，但大速度的定向流动易受动量依赖性。因此，了解在广泛的梁能量和速度范围内的高素子的定向流有助于理解密集物质中的超子电位。
We examine the $Λ$ potential from the chiral effective field theory ($χ$EFT) via the $Λ$ directed flow from heavy-ion collisions. We implement the $Λ$ potential obtained from the $χ$EFT in a vector potential version of relativistic quantum molecular dynamics. We find that the $Λ$ potentials obtained from the $χ$EFT assuming weak momentum dependence reproduce the $Λ$ directed flow measured by the STAR collaboration in the Beam Energy Scan program. While the $Λ$ directed flow is not very sensitive to the density dependence of the potential, the directed flow at large rapidities is susceptible to the momentum dependence. Thus understanding the directed flow of hyperons in a wide range of beam energy and rapidity is helpful in understanding hyperon potentials in dense matter.
