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arXiv 0809.5043hep-phastro-ph
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超相对论加速质子的粒子产生阈

On the particle production threshold for ultra-relativistic accelerated protons

Douglas Fregolente

摘要:

在极端环境中加速的宇宙射线粒子的非电磁辐射已经使用不同的半经典形式主义的变化进行了研究。由于这种粒子的能量损失机制是非常感兴趣的,人们必须在某种意义上改进先前在场的情况下对经典源的直观描述。在这个简短的说明中,我们评估了辐射过程中粒子的经典和维本征加速度所起的作用。人们打算表明,作为一个测量参数的加速度的引入给出了一个适当的规模考虑大量的粒子发射的过程。如果没有达到加速度阈值,人们就在考虑一种机制,在这种机制中,大量粒子的产生过程受到抑制。分析是在一个半经典的形式主义,一旦适用于不同的情况下,已经检查了一系列文件的一致性。作为结果的进一步应用,我们评估的可能性不可忽略的介子生产的质子加速的极帽模型的框架内运行的电磁场的质子。结果表明,在磁场为B \geq 10^{12} G的系统中,质子的介子发射是不可忽略的.

英文摘要:

Non-electromagnetic emission from cosmic ray particles accelerated in extreme environments has been studied using different variations of semi-classical formalisms. As the energy loss mechanisms of such particles is of great interest, one must improve in some sense the previously intuitive description of classical sources in the presence of fields. In this brief note we evaluate the role played by the classical and dimensional proper acceleration of a particle in radiation processes. One intends to show that the introduction of the acceleration as a measure parameter gives an adequate scale for considering the processes of massive particle emission. If the acceleration threshold is not attained one is considering a regime where the processes of massive particle production are suppressed. The analysis is performed in a semiclassical formalism once applied in different contexts and already checked for consistency in a serie of papers. As a further application of the results we evaluate the possibility of a non negligible meson production by protons accelerated in the framework of polar cap models operating in electromagnetic fields of pulsars. It is shown that inside a systems endowed with magnetic fields B\geq 10^{12} G the meson emission by protons must not be disregarded.

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