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arXiv 2101.02671hep-ph
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用非对称光子对撞机观测真空中的光-光散射

Observing Light-by-Light Scattering in Vacuum with an Asymmetric Photon Collider

Maitreyi Sangal, Christoph H. Keitel, Matteo Tamburini

摘要:

真空中两个实光子的弹性散射是量子电动力学所预言的全新过程中最难以捉摸的过程之一。这就解释了为什么尽管早在80多年前就有人预测到了,但到目前为止还没有被发现。在这里,我们表明,在目前的设施,两个真正的光子的弹性散射可以成为可检测的远轴在非对称光子光子对撞机设置。这可以在一天的操作时间内通过将1 mJ的极紫外脉冲与超相对论电子束非线性康普顿散射中产生的宽带伽马射线辐射进行碰撞来实现,其中超相对论电子束与以10 Hz重复率操作的太瓦级光学激光脉冲进行非线性康普顿散射。除了研究弹性光子-光子散射,这项技术还使我们能够揭示或限制光子与尚未探测到的粒子耦合可能产生的新物理,从而为标准模型之外的物理研究开辟了新的途径。

英文摘要:

The elastic scattering of two real photons in vacuum is one of the most elusive of the fundamentally new processes predicted by quantum electrodynamics. This explains why, although it was first predicted more than eighty years ago, it has so far remained undetected. Here we show that in present-day facilities, the elastic scattering of two real photons can become detectable far off axis in an asymmetric photon-photon collider setup. This may be obtained within one day of operation time by colliding 1 mJ extreme ultraviolet pulses with the broadband gamma-ray radiation generated in nonlinear Compton scattering of ultrarelativistic electron beams with terawatt-class optical laser pulses operating at a 10 Hz repetition rate. In addition to the investigation of elastic photon-photon scattering, this technique allows us to unveil or constrain new physics that could arise from the coupling of photons to yet undetected particles, therefore opening new avenues for searches of physics beyond the standard model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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