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arXiv 1509.03583hep-ph
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电弱标度的镜像宇宙学弛豫

Mirror Cosmological Relaxation of the Electroweak Scale

Oleksii Matsedonskyi

摘要:

在[1]中提出的宇宙学弛豫机制允许在弱标度和理论截止之间动态产生大的分离,在跨越未破缺和破缺对称相之间的极限时使用理论行为的急剧变化。在本说明中,我们提出了一个变化的情况下,在正确的位置的电弱标度的稳定是由$Z_2$对称交换标准模型(SM)与其镜像副本。我们勾勒出可能的方式来产生可行的宇宙的热演化,并讨论新的物理效应的实验可及性。我们表明,在这种情况下,镜子SM可以有相当大的耦合与普通的,或者,相反,可以与它的强度可以忽略不计。这种结构所允许的总截止能量可以达到$10^9$ GeV。

英文摘要:

The cosmological relaxation mechanism proposed in [1] allows for a dynamically generated large separation between the weak scale and a theory cutoff, using a sharp change of theory behaviour upon crossing the limit between unbroken and broken symmetry phases. In this note we present a variation of this scenario, in which stabilization of the electroweak scale in the right place is ensured by the $Z_2$ symmetry exchanging the Standard Model (SM) with its mirror copy. We sketch the possible ways to produce viable thermal evolution of the Universe and discuss experimental accessibility of the new physics effects. We show that in this scenario the mirror SM can either have sizeable couplings with the ordinary one, or, conversely, can interact with it with a negligible strength. The overall cutoff allowed by such a construction can reach $10^9$ GeV.

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