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arXiv 0709.4478hep-th
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破坏Lorentz的真空切伦科夫辐射的有限持续时间和能量效应

Finite Duration and Energy Effects in Lorentz-Violating Vacuum Cerenkov Radiation

Brett Altschul

摘要:

真空切伦科夫辐射在某些洛伦兹破坏的量子场论中是可能的,当非常有能量的电荷移动速度超过光速时。在CPT均匀,违反洛伦兹修改的光子扇区的存在下,切伦科夫过程的特征由辐射光谱的高频行为控制。切伦科夫过程的发展可能会有明显的不同,这取决于对高能光子发射的唯一限制是否来自能量-动量守恒,或者是否存在切断高频光谱的附加效应。此外,由于高频截止决定了发射电荷损失能量的总速率,因此它还控制了与过程的有限持续时间相关的发射的所有方面。

英文摘要:

Vacuum Cerenkov radiation is possible in certain Lorentz-violating quantum field theories, when very energetic charges move faster than the phase speed of light. In the presence of a CPT-even, Lorentz-violating modification of the photon sector, the character of the Cerenkov process is controlled by the high-frequency behavior of the radiation spectrum. The development of the Cerenkov process can be markedly different, depending on whether the only limits on the emission of very energetic photons come from energy-momentum conservation or whether there are additional effects that cut off the spectrum at high frequencies. Moreover, since the high-frequency cutoff determines the total rate at which an emitting charge loses energy, it also controls all aspects of the emission that are related to the process's finite duration.

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