Abstract In this note we study the conversion of nucleons into deltas induced by a strong magnetic field in ultraperipheral relativistic heavy ion collisions. The interaction Hamiltonian couples the magnetic field to the spin operator, which, acting on the spin part of the wave function, converts a spin 1/2 into a spin 3/2 state. We estimate this transition probability and calculate the cross section for delta production. This process can in principle be measured, since the delta moves close to the beam and decays almost exclusively into pions. Forward pions may be detected by forward calorimeters.

中文翻译：

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相对论重离子碰撞中的磁​​激发

摘要 在这篇文章中，我们研究了超外围相对论重离子碰撞中由强磁场引起的核子转化为δ。相互作用哈密顿量将磁场耦合到自旋算子，后者作用于波函数的自旋部分，将自旋 1/2 转换为自旋 3/2 状态。我们估计这种转变概率并计算三角洲生产的横截面。这个过程原则上是可以测量的，因为 delta 靠近光束移动并且几乎完全衰变成π介子。可以通过正向量热计检测正向π介子。