标题： 束缚体系在Bethe-Salpeter方法中的电流守恒 显示英文标题

标题： Current conservation in electrodisintegration of a bound system in the Bethe-Salpeter approach

摘要： 使用我们在闵可夫斯基空间中采用OBE核求解的Bethe-Salpeter方程，针对束缚态和散射态，我们计算了束缚系统电离分解的转变形式因子，这些形式因子决定了该过程的电磁电流J。 特别强调了验证规范不变性，这应在电流守恒中体现出来。 我们发现，对于任何动量转移q的值，平面波和最终态相互作用对量J.q的贡献彼此抵消，从而提供J.q=0。 然而，这种抵消只有在初始的Bethe-Salpeter振幅（束缚态）、最终的振幅（散射态）和电流算符严格一致的情况下才能得到。 只有在这种情况下，才能得到转变形式因子的可靠结果。 显示英文摘要

摘要： Using our solutions of the Bethe-Salpeter equation with OBE kernel in Minkowski space both for the bound and scattering states, we calculate the transition form factors for electrodisintegration of the bound system which determine the electromagnetic current J of this process. Special emphasis is put on verifying the gauge invariance which should manifest itself in the current conservation. We find that for any value of the momentum transfer q the contributions of the plane wave and the final state interaction to the quantity J.q cancel each other thus providing J.q=0. However, this cancellation is obtained only if the initial Bethe-Salpeter amplitude (bound state), the final one (scattering state) and the current operator are strictly consistent with each other. A reliable result for the transition form factor can be found only in this case.