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arXiv 2107.07560hep-ph
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暗物质的电弱对称性不可恢复

Electroweak Symmetry Non-Restoration from Dark Matter

Oleksii Matsedonskyi, James Unwin, Qingyun Wang

摘要:

在希格斯质量附近的温度下,电弱对称性的恢复与许多重子生成场景的严格唯象约束有关。一个潜在的补救措施可以在电弱对称性非恢复(SNR)机制中找到,其中对称性破缺由于与标准模型耦合的新状态而扩展到更高的温度。在这里,我们表明,在存在第二个希格斯偶极子,SNR可以实现只有少数新的费米子,可以确定为可行的暗物质候选人符合所有当前的观测约束。对这类模型的竞争要求允许在高达$\sim$ TeV的温度下的SNR,并意味着存在亚TeV的新物理与标准模型的相当大的相互作用。因此,这种情况是高度可测试的信号达到下一代对撞机和暗物质直接检测实验。

英文摘要:

Restoration of the electroweak symmetry at temperatures around the Higgs mass is linked to tight phenomenological constraints on many baryogenesis scenarios. A potential remedy can be found in mechanisms of electroweak symmetry non-restoration (SNR), in which symmetry breaking is extended to higher temperatures due to new states with couplings to the Standard Model. Here we show that, in the presence of a second Higgs doublet, SNR can be realized with only a handful of new fermions which can be identified as viable dark matter candidates consistent with all current observational constraints. The competing requirements on this class of models allow for SNR at temperatures up to $\sim$TeV, and imply the presence of sub-TeV new physics with sizable interactions with the Standard Model. As a result this scenario is highly testable with signals in reach of next-generation collider and dark matter direct detection experiments.

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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