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arXiv 0810.1317hep-ph
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镜像粒子“毫电荷”的宇宙学界限

Cosmological bounds on the "millicharges" of mirror particles

Zurab Berezhiani, Angela Lepidi

摘要:

镜像世界是一个平行的隐藏扇区,其微观物理与普通粒子物理相同,可以有几个有趣的现象学和天体物理意义,镜像物质可以是宇宙中暗物质的天然候选者。如果普通光子和镜像光子由于拉格朗日项$(ε/2) F_{μν} F'^{μν}$而具有动力学混合,则镜像粒子有效地获得相对于普通光子的电荷$\sim ε$,使得它们成为一种历史上被创造为“毫荷电”的粒子,尽管现在它们必须被更恰当地称为“纳米荷电”。本文修正了动力学混合参数的宇宙学界,并在精确镜像宇称的情况下,设定了一个上限$ε< 3 \times 10^{-10}$。在非对称镜扇形的情况下,可以得到弱得多的极限,其电弱对称性破缺标度比普通电弱标度大。

英文摘要:

Mirror world, a parallel hidden sector with microphysics identical to ordinary particle physics, can have several interesting phenomenological and astrophysical implications and mirror matter can be a natural candidate for dark matter in the universe. If the ordinary and the mirror photons have a kinetic mixing due to the Lagrangian term $(ε/2) F_{μν} F'^{μν}$, then mirror particles effectively acquire the electric charges $\sim ε$ with respect to the ordinary photon, so that they become a sort of particles historically coined as "millicharged" though nowadays they must be called more appropriately as "nanocharged". In this paper we revise the cosmological bounds on the kinetic mixing parameter and in the case of exact mirror parity set an upper limit $ε< 3 \times 10^{-10}$. Much weaker limit can be obtained in the case of asymmetric mirror sector, with an electroweak symmetry breaking scale larger than the ordinary electroweak scale.

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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