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arXiv 2103.02615hep-phastro-ph.CO
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亚稳共形暗物质

Metastable Conformal Dark Matter

Philippe Brax, Kunio Kaneta, Yann Mambrini, Mathias Pierre

摘要:

我们表明,一个亚稳态的暗物质候选人自然产生的爱因斯坦度量,引力子的归一化状态,和约旦度量之间的共形变换支配重力和物质之间的耦合。尽管在很大的尺度上,约旦度规显示出对爱因斯坦框架度规的修改,但暗物质主要在原始等离子体中与希格斯场的能量动量张量耦合。这使得暗物质的产生量足以与观测相符。暗物质的隔离使它的质量为$\lesssim 1$ MeV,寿命远高于宇宙的年龄和目前的实验极限。这样的暗物质场景具有由候选暗物质衰变为中微子和/或$γ-$射线产生的清晰的单色特征。

英文摘要:

We show that a metastable dark matter candidate arises naturally from the conformal transformation between the Einstein metric, where gravitons are normalised states, and the Jordan metric dictating the coupling between gravity and matter. Despite being secluded from the Standard Model by a large scale above which the Jordan metric shows modifications to the Einstein frame metric, dark matter couples to the energy momentum tensor of the Higgs field in the primordial plasma primarily. This allows for the production of dark matter in a sufficient amount which complies with observations. The seclusion of dark matter makes it long-lived for masses $\lesssim 1$ MeV, with a lifetime much above the age of the Universe and the present experimental limits. Such a dark matter scenario has clear monochromatic signatures generated by the decay of the dark matter candidate into neutrino and/or $γ-$rays.

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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