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arXiv 1907.00643physics.plasm-ph
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线偏振和圆偏振laser短脉冲中非线性Breit-Wheeler和Compton过程的多光子区

Multi-photon regime of non-linear Breit-Wheeler and Compton processes in short linearly and circularly polarized laser pulses

A. I. Titov, A. Otto, B. Kampfer

摘要:

分析了线偏振和圆偏振短脉冲激光在多光子区的非线性Breit-Wheeler $e^+e^-$对产生及其交叉通道--非线性康普顿过程。多光子过程的总截面的贡献是确定的,我们还表明,(i)在这些过程中的出射电子的方位角分布不同的定性水平,和(ii)它们取决于脉冲的偏振特性。有限载波包络相位(CEP)导致所考虑过程的方位角分布的非平凡非单调行为。该效应可用于CEP测定。

英文摘要:

Non-linear Breit-Wheeler $e^+e^-$ pair production and its crossing channel - the non-linear Compton process - in the multi-photon regime are analyzed for linearly and circularly polarized short laser pulses. The contribution of multi-photon processes to total cross sections is determined and we also show that (i) the azimuthal angular distributions of outgoing electrons in these processes differ on a qualitative level, and (ii) they depend on the polarization properties of the pulses. A finite carrier envelope phase (CEP) leads to a non-trivial non-monotonic behavior of the azimuthal angle distributions of the considered processes. That effect can be used for the CEP determination.

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