arXiv 1503.010782015-03hep-ph

MSSM延伸导线中的$μ\to e γ$衰减

$μ\to e γ$ Decay in an MSSM Extension

Tarek Ibrahim, Ahmad Itani, Pran Nath

备注：: 23 pages, 6 figures and 2 tables. Accepted for publication in Physical Review D. arXiv admin note: text overlap with arXiv:1406.0083, arXiv:1403.6448

摘要：

分析了类向量生成的MSSM扩展中的衰减$μ\to e+ γ$。在这里，与镜子的混合允许这种衰变的可能性。分析是在一个循环的水平与交换charginos和neutralinos和slepton和镜像slepton的循环。一个单圈分析与W和Z玻色子交换和镜像轻子和中微子也被考虑。详细分析了新扇区CP破坏相位对$μ\to e γ$衰变的影响。探讨了由$2.4\times 10^{-12}$（90\% CL）的MEG实验的分支比${\cal{B}}(μ\to {e} γ)$的当前上限对超对称模型和类矢量模型的参数空间的约束。此外，MEG实验可能会在未来几年内将上限提高一个数量级。改进的限制将允许人们探测扩展模型的参数空间的更大的域。

英文摘要：

An analysis is given of the decay $μ\to e+ γ$ in an MSSM extension with a vectorlike generation. Here mixing with the mirrors allows the possibility of this decay. The analysis is done at the one loop level with the exchange of charginos and neutralinos and of sleptons and mirror sleptons in the loops. A one loop analysis with W and Z boson exchange and mirror leptons and neutrinos is also considered. The effects of CP violating phases from the new sector on the decay $μ\to e γ$ are analyzed in detail. The constraints arising from the current upper limit on the branching ratio ${\cal{B}}(μ\to {e} γ)$ from the MEG experiment of $2.4\times 10^{-12}$ (at 90\% CL) on the parameter space of SUSY models and on vectorlike models are explored. Further, the MEG experiment is likely to improve the upper limit by an order of magnitude in the coming years. The improved limits will allow one to probe a much larger domain of the parameter space of the extended models.

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摘要：

英文摘要：

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