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arXiv 0907.5189hep-phnucl-th
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高能核上轻子光生的多光子相互作用

Multi-photon interactions in lepton photo-production on nuclei at high energies

Kirill Tuchin

摘要:

本文研究了高能重核和核介质中轻子光生量子电动力学中的多光子效应。我们感兴趣的是能量,电荷密度和核的几何形状依赖的截面。我们使用的碰撞参量表示,使我们能够减少光生产的问题,在核库仑场的电偶极子的传播问题。在Glauber模型的框架下,我们恢复了与电偶极子在核上的多次再散射相对应的多光子振幅的无穷级数。我们发现,由于多光子相互作用所产生的幺正效应是小的和能量无关的散射在一个单一的核,而在宏观核介质的情况下,他们饱和的几何限制的总截面。我们讨论了核介质和强激光束之间的类比。

英文摘要:

We study multi-photon effects in quantum electrodynamics in lepton photo-production on heavy nuclei and nuclear medium at high energies. We are interested in energy, charge density and nuclear geometry dependence of the cross sections. We use the impact parameter representation that allows us to reduce the problem of photo-production to the problem of propagation of electric dipoles in the nuclear Coulomb field. In the framework of the Glauber model we resum an infinite series of multiphoton amplitudes corresponding to multiple rescattering of the electric dipole on the nucleus. We find that unitarity effects arising due to multi-photon interactions are small and energy-independent for scattering on a single nucleus, whereas in the case of macroscopic nuclear medium they saturate the geometric limit of the total cross section. We discuss an analogy between nuclear medium and intense laser beams.

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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