AI 中文总结
该研究针对RHIC能量下Υ粒子压低机制，通过求解输运方程、对比核修正因子与实验数据，证实热衰变诱导的持续压低而非颜色屏蔽主导重离子碰撞中夸克偶素的压低。
AI 中文摘要
为明确相对论重离子碰撞中重夸克偶素压低的机制，本文仅通过压低率求解输运方程，研究RHIC能量下的Υ粒子产生。通过计算核修正因子并与实验数据对比，发现由颜色屏蔽温度主导的瞬时压低无法同时描述Υ的基态与激发态，而由热衰变诱导的持续压低可成功复现所有Υ测量结果。这为重离子碰撞中夸克偶素压低由热部分子的非弹性散射（而非颜色屏蔽）主导提供了有力证据。
英文摘要
To clearly identify the mechanism behind the suppression of heavy quarkonium in relativistic heavy-ion collisions, we study $Υ$ production at RHIC energies by solving its transport equation driven solely by the suppression rates. By calculating the nuclear modification factor and comparing it with experimental data, we find that the sudden suppression governed by the color-screening temperature cannot simultaneously describe both the ground and excited states of the $Υ$, whereas the continuous suppression induced by thermal decay successfully reproduces all the $Υ$ measurements. This provides strong evidence that inelastic scatterings with thermal partons, rather than color screening, dominate quarkonium suppression in heavy-ion collisions.
Comments6 pages, 3 figures
