再论波多尔斯基电磁学中的费米子螺旋度翻转
Revisiting fermion helicity flip in Podolsky's Electromagnetism
摘要：
一个有质量的粒子在其运动方向上的自旋投影被称为螺旋性（或“旋向性”）。它可以是积极的或消极的。当一个粒子的螺旋度由于与其他粒子或场的相互作用而从正变到负（反之亦然）时，我们称之为螺旋度翻转。在这项工作中，我们表明，这种螺旋翻转可以看到一个电子的$20 MeV$的能量与一个带电的标量介子通过交换的虚光子。这个光子{ \it不一定}必须是波多尔斯基提出的光子;事实上，它与波多尔斯基提出的光子无关。
英文摘要：
The spin projection of a massive particle onto its direction of motion is called helicity (or "handedness"). It can therefore be positive or negative. When a particle's helicity changes from positive to negative (or vice-versa) due to its interaction with other particles or fields, we say there is a helicity flip. In this work we show that such helicity flip can be seen for an electron of $20 MeV$ of energy interacting with a charged scalar meson through the exchange of a virtual photon. This photon {\it does not} necessarily need to be Podolsky's proposed photon; in fact, it is independent of it.
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