Amplitudes, observables, and classical scattering

Amplitudes, observables, and classical scattering
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DOI:
10.1007/jhep02(2019)137
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发表时间:
2018-11
影响因子:
5.4
通讯作者:
D. Kosower;Ben Maybee;D. O’Connell
D. Kosower;Ben Maybee;D. O’Connell
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
D. Kosower;Ben Maybee;D. O’Connell

文献摘要

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我们提出了一种直接从壳上量子散射振幅计算经典可测量量的形式。我们讨论了获得经典结果所需的要素,并展示了如何建立计算以有效地推导结果。我们这样做不需要专门研究一个特定的理论。我们详细地研究了电动力学中的两个例子:无自旋散射中动量向次领先阶的转移,以及动量向领先阶的辐射。
We present a formalism for computing classically measurable quantities directly from on-shell quantum scattering amplitudes. We discuss the ingredients needed for obtaining the classical result, and show how to set up the calculation to derive the result efficiently. We do this without specializing to a specific theory. We study in detail two examples in electrodynamics: the momentum transfer in spinless scattering to next-to-leading order, and the momentum radiated to leading order.