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arXiv 0907.3709hep-phastro-ph.HEgr-qchep-th
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洛伦兹破坏QED的反常正电子过剩

Anomalous positron excess from Lorentz-violating QED

Alexander A. Andrianov, Domenec Espriu, Paola Giacconi, Roberto Soldati

摘要:

我们接受这样的想法,即一个合适的背景冷(非常低的动量)赝标粒子或凝聚,可能会触发一个背景,有效地产生洛伦兹不变性破坏。这种类似以太的背景导致了QED的Chern-Simons修正。在不同的坐标系中,物理学是不同的,在赝标背景的静止坐标系中,高动量光子可以衰变成对。这种衰变的阈值与粒子的静止质量成平方关系。这种机制可以自然地解释为什么在最近的宇宙射线测量中没有反质子。在重离子碰撞中,类似的信号可以作为赝标凝聚的探针。

英文摘要:

We entertain the idea that a suitable background of cold (very low momentum) pseudoscalar particles or condensate, may trigger a background that effectively generates Lorentz-invariance violation. This aether-like background induces a Chern-Simons modification of QED. Physics is different in different frames and, in the rest frame of the pseudoscalar background, high momentum photons can decay into pairs. The threshold for such decay depends quadratically on the rest mass of the particles. This mechanism could explain in a natural way why antiprotons are absent in recent cosmic ray measurements. A similar signal could be used as a probe of pseudoscalar condensation in heavy ion collisions.

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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