Survival probabilities of charmonia as a clue to measure transient magnetic fields
Survival probabilities of charmonia as a clue to measure transient magnetic fields
复制标题
DOI：
10.1016/j.physletb.2021.136498
复制
发表时间：
2021-04
影响因子：
4.4
通讯作者：
S. Iwasaki;D. Jido;M. Oka;Kei Suzuki
中科院分区：
文献类型：
--
作者：
S. Iwasaki;D. Jido;M. Oka;Kei Suzuki
我们研究了在含时均匀磁场下S波charmonium粒子数的时间演化，并计算了低位charmonia粒子的生存概率，以估计重离子碰撞时的磁场强度.我们的方法实现了不同的自旋本征态之间的混合和过渡到径向激发态。我们表明，生存概率可以改变，即使是一个极短的磁场。此外，我们发现，生存概率依赖于初始自旋状态。我们提出的自旋伙伴的生存概率的总和作为一个观察不敏感的初始状态。我们还发现，该和可以近似地作为σ B 0 2的函数，具有持续时间σ和磁场的最大强度B 0。
We investigate time evolution of S-wave charmonium populations under a time-dependent homogeneous magnetic field and evaluate survival probabilities of the low-lying charmonia to the goal of estimating the magnetic field strength at heavy-ion collisions. Our approach implements mixing between different spin eigenstates and transitions to radially excited states. We show that the survival probabilities can change even by an extremely short magnetic field. Furthermore, we find that the survival probabilities depend on the initial spin states. We propose the sum of the survival probabilities over spin partners as an observable insensitive to the initial states. We also find that the sum can be approximately given as a function of σ B 0 2 with a duration time σ and the maximum strength of the magnetic field B 0.