论文标题
扭曲的粒子碰撞：旋转物理的新工具
Twisted particle collisions: a new tool for spin physics
论文作者
论文摘要
扭曲颗粒的碰撞---即光子，电子或任何其他粒子的非平面波状态，配备了非零轨道角动量（OAM）相对于其传播方向的碰撞 - 提供了探测粒子结构和相互作用的新方法。在最近的论文\ cite {ivanov：2019vxe}中，我们认为，即使初始粒子没有启用，即使初始粒子不启动，在扭曲的光子碰撞或扭曲的$ e^+e^ - $ e^+e^ - $。在这里，我们详细探讨了这些功能，提供了定性图片，并用数字示例进行了说明。我们展示了如何在非极化扭曲光子的碰撞中检测奇偶校验效应，以及如何在未极化扭曲的$ e^+e^ - $ nihilation中产生近100美元的$ 100 \％$偏振媒介中的介子。这些例子突出了扭曲粒子提供的对极化的前所未有的控制水平，在通常的平面波碰撞中不可能。
Collisions of twisted particles --- that is, non-plane-wave states of photons, electrons, or any other particle, equipped with a non-zero orbital angular momentum (OAM) with respect to its propagation direction --- offer novel ways to probe particle structure and interactions. In the recent paper \cite{Ivanov:2019vxe}, we argued that resonance production in twisted photon collisions or twisted $e^+e^-$ annihilation gives access to parity- and spin-sensitive observables in inclusive cross sections, even when the initial particles are unpolarized. Here, we explore these features in detail, providing a qualitative picture and illustrating it with numerical examples. We show how one can detect parity-violating effects in collisions of unpolarized twisted photons and how one can produce almost $100\%$ polarized vector mesons in unpolarized twisted $e^+e^-$ annihilation. These examples highlight the unprecedented level of control over polarization offered by twisted particles, impossible in the usual plane wave collisions.
