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arXiv 1003.2447hep-ph
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超越MSSM的CP破坏:重子生成和电偶极子矩

CP violation Beyond the MSSM: Baryogenesis and Electric Dipole Moments

Kfir Blum, Cedric Delaunay, Marta Losada, Yosef Nir, Sean Tulin

摘要:

我们研究电弱重子和电偶极矩的存在下,两个领先的顺序,非重整化运营商在希格斯部门的MSSM。从MSSM重子生成的显着的定性和定量的差异出现,由于新的CP违反阶段的存在和放松的约束的超对称谱(特别是,两个停止可以是轻的)。我们发现:(1)由穿过泡壁的希格斯粒子的相位变化驱动的自发重子生成成为可能;(2)顶部和停止CP破坏源可以变得有效;(3)重子生成在参数空间的更大部分是可行的,减轻了与MSSM重子生成相关的众所周知的微调。尽管如此,电偶极矩应测量,如果实验灵敏度提高约一个数量级。

英文摘要:

We study electroweak baryogenesis and electric dipole moments in the presence of the two leading-order, non-renormalizable operators in the Higgs sector of the MSSM. Significant qualitative and quantitative differences from MSSM baryogenesis arise due to the presence of new CP-violating phases and to the relaxation of constraints on the supersymmetric spectrum (in particular, both stops can be light). We find: (1) spontaneous baryogenesis, driven by a change in the phase of the Higgs vevs across the bubble wall, becomes possible; (2) the top and stop CP-violating sources can become effective; (3) baryogenesis is viable in larger parts of parameter space, alleviating the well-known fine-tuning associated with MSSM baryogenesis. Nevertheless, electric dipole moments should be measured if experimental sensitivities are improved by about one order of magnitude.

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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