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arXiv 2001.12003hep-thhep-ph
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甚狭义相对论中的光子-光子散射

Photon-Photon Scattering in Very Special Relativity

Jorge Alfaro, Alex Soto

摘要:

从Mandelstam-Leibbrandt公式出发,给出了零矢量$\bar{n}$计算任意外分支数的$SIM(2)$积分和图的一般规则.利用该公式,在甚狭义相对论(VSR)框架下计算了光子-光子散射的低能极限。该公式自动保持了对应于规范对称性的沃德恒等式。在低动量近似下,我们得到了光子-光子散射的标准非偏振微分截面。结果表明,在VSR中,如果壳层上有任何外光子腿,则环将为零。

英文摘要:

Starting from the Mandelstam-Leibbrandt prescription, we introduce a general rule for the null vector $\bar{n}$ to compute any $SIM(2)$ integral and diagram with an arbitrary number of external legs. Using the new prescription, the computation of the low energy limit of photon-photon scattering under the Very Special Relativity (VSR) framework is presented. The prescription preserves automatically the Ward identities corresponding to the gauge symmetry. Within the low momentum approximation we get the standard unpolarized differential cross section for photon-photon scattering. The result suggests that loops with any external photon legs on-shell will be zero in VSR.

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