Possible Precise Measurement of Delbruck Scattering Using Polarized Photon Beams
Possible Precise Measurement of Delbruck Scattering Using Polarized Photon Beams
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使用偏振光子束精确测量德尔布吕克散射的可能
DOI：
10.1103/physrevlett.118.204801
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发表时间：
2017
影响因子：
8.6
通讯作者：
Hayakawa Takehito
中科院分区：
文献类型：
--
作者：
Koga James K.;Hayakawa Takehito
高通量极化射线源的出现使得精确测量真空对光子弹性散射的贡献（德尔布吕克散射）成为可能。由于光子的弹性散射是四个过程的相干叠加，而且到目前为止还使用了非偏振源，因此还没有进行Delbrück散射的孤立测量。我们表明，适当选择的散射角，光子偏振，和能量，这种散射可以测量几乎独立于其他散射过程。这使得精确测量真空对散射的贡献和探测新物理的可能性成为可能。
The advent of high-flux-polarized-ray sources makes possible the nearly isolated precise measurement of the vacuum contribution, Delbrück scattering, to the elastic scattering of these photons off nuclei. Because of the fact that the elastic scattering of the photons is a coherent summation of four processes and that up to now unpolarized sources have been used, the isolated measurement of Delbrück scattering has not been performed. We show that for the appropriate choice of scattering angles, photon polarization, and energies this scattering can be measured nearly independently of other scattering processes. This makes possible the precise measurement of the vacuum contribution to scattering and the possibility of the detection of new physics.