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arXiv 2303.00705hep-ph
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暗物质区播种的强CP问题解决方案

Dark-sector seeded solution to the strong CP problem

H. B. Câmara, F. R. Joaquim, J. W. F. Valle

AI总结:

我们提出一种由暗物质区播种的Nelson-Barr机制新实现,通过两圈修正解决强CP问题,同时提供稳定的标量暗物质候选者。

摘要:

我们提出了一种由包含标量和类矢量夸克的暗物质区“播种”的Nelson-Barr机制的新实现。电荷-宇称(CP)和$\mathcal{Z}_8$对称性通过单态标量的复真空期望值自发破缺,留下残余的$\mathcal{Z}_2$对称性稳定暗物质(DM)。复Cabibbo-Kobayashi-Maskawa矩阵通过暗物质区介导的夸克质量矩阵的单圈修正产生。与其他强CP相非零贡献在单圈出现的提议不同,我们的情况仅在两圈出现,增强了自然性。我们的方案还提供了一个可行的弱相互作用大质量粒子标量DM候选者。

英文摘要:

We propose a novel realization of the Nelson-Barr mechanism "seeded'' by a dark sector containing scalars and vector-like quarks. Charge-parity (CP) and a $\mathcal{Z}_8$ symmetry are spontaneously broken by the complex vacuum expectation value of a singlet scalar, leaving a residual $\mathcal{Z}_2$ symmetry that stabilizes dark matter (DM). A complex Cabibbo-Kobayashi-Maskawa matrix arises via one-loop corrections to the quark mass matrix mediated by the dark sector. In contrast with other proposals where non-zero contributions to the strong CP phase arise at the one-loop level, in our case this only occurs at two loops, enhancing naturalness. Our scenario also provides a viable weakly interacting massive particle scalar DM candidate.

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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