期刊
PHYSICS LETTERS B
卷 681, 期 3, 页码 276-281出版社
ELSEVIER
DOI: 10.1016/j.physletb.2009.10.023
关键词
-
资金
- European FP6 Network UniverseNet [MRTN-CT-2006-035863]
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 (epsilon/2)F mu nu F'(mu nu) then mirror particles effectively acquire the electric charges similar to epsilon 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 Letter we revise the cosmological bounds on the kinetic mixing parameter and in the case of exact mirror parity set an upper limit epsilon < 3 x 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. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据