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arXiv 1904.03384nucl-thhep-ph
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强电场对夸克-胶子等离子体中Charmonium演化的影响

The effect of strong electric field on the evolution of charmonium in quark gluon plasma

Wu Biaogang, Chen Baoyi, Zhao Xingbo

摘要:

在极端相对论重离子碰撞中,高速运动的重离子会产生很强的电场。在碰撞的早期阶段,电场$E$的大小在$eE\sim m_π^2$的数量级。在夸克胶子等离子体中,强电场将会对粲夸克偶素的演化产生巨大的影响。我们用含时薛定谔方程计算夸克胶子等离子体中由高速运动电荷所产生强电场对重夸克偶素演化的影响。此电场可以导致不同角动量态之间的跃迁。为了观察这种效应,我们比较了有和没有电场时$ J/ψ$、$ψ'$和$χ_c$的产率。结果表明,在碰撞初期,电场诱导$J/ψ$分子发生了明显的解离.同时,通过电场从$J/ψ$跃迁产生$χ_c$。

英文摘要:

In ultra-relativistic heavy-ion collisions, the strong electric field can be produced by the colliding nuclei. The magnitude of the electric field $E$ is on the order of $eE\sim m_π^2$ at the early stage of the collision. In quark gluon plasma (QGP), such a strong electric field can have a significant impact on the evolution of charmonia. We employ the time-dependent Schrödinger equation to study the evolution of charmonium states in the strong electric field generated by the moving charges. The electric field can result in transitions between charmonium states with different angular momenta. In order to see this effect, we make comparisons between the yields of $ J/ψ$, $ψ'$ and $χ_c$ with and without the electric field. The results show that in the early stage of the collision the electric field induces significant dissociation of $J/ψ$. In the meantime, $χ_c$ is generated via the transition from $J/ψ$ by the electric field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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