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arXiv 0912.5250hep-ph
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光子在电场中的对产生

Pair creation by a photon in an electric field

V. N. Baier, V. M. Katkov

摘要:

从场的极化算符出发,研究了光子在均匀恒定电场中产生对的过程。该过程的总概率以相对简单的形式被发现。在高能处,准经典近似是有效的。计算了对标准准经典近似(SQA)的修正。在相对低的光子能量的区域,SQA是不适用的,新的近似被使用。结果表明,在这个能量区间内,光子在电场中产生对的几率基本上超过了在磁场中产生对的几率。这种方法在光子能量远大于电场中的“真空”能量时有效:$ω\gg eE/m$。对于较小的光子能量的低能近似。在$ω\ll eE/m$中,发现的概率描述了由电场产生的粒子对软光子的吸收。

英文摘要:

The process of pair creation by a photon in a constant and homogeneous electric field is investigated basing on the polarization operator in the field. The total probability of the process is found in a relatively simple form. At high energy the quasiclassical approximation is valid. The corrections to the standard quasiclassical approximation (SQA) are calculated. In the region relatively low photon energies, where SQA is unapplicable, the new approximation is used. It is shown that in this energy interval the probability of pair creation by a photon in electric field exceeds essentially the corresponding probability in a magnetic field. This approach is valid at the photon energy much larger than "vacuum" energy in electric field: $ω\gg eE/m$. For smaller photon energies the low energy approximation is developed. At $ω\ll eE/m$ the found probability describes the absorption of soft photon by the particles created by an electric field.

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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