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arXiv 1003.4782hep-phhep-th
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随机超空间中的中微子质量和s粒子谱

Neutrino masses and sparticle spectra from stochastic superspace

Archil Kobakhidze, Nadine Pesor, Raymond R. Volkas

摘要:

基于软破缺超对称性的随机超空间机制,我们提出了改进的sparticle谱计算的极小模型和检查扩展通过R-宇称破坏和I型跷跷板机制,将非零中微子质量更现实的模型。执行两个循环的精度计算,我们观察到预测的sparticle质量的全球减少。然而,这并不影响我们早期工作中概述的极小模型的一般特征,包括特征光阻质量。我们发现停止衰变通道可在大型强子对撞机,这可以用来与我们的预测范围停止混合角伪造随机超对称的极小模型。然后,我们引入中微子质量和混合实验包括纯三线性R-宇称违反超势项一致,导致一个可行的随机超空间模型缺乏暗物质的候选人。另一种产生中微子质量的方法,即I型跷跷板机制,被发现只有当中微子汤川耦合相对于顶部汤川是小的,截止尺度是大的,是可行的。

英文摘要:

Based on the stochastic superspace mechanism for softly breaking supersymmetry, we present improved sparticle spectra computations for the minimal model and examine extensions through R-parity violation and the type-I seesaw mechanism that incorporate non-zero neutrino masses for more realistic models. Performing the calculations to two-loop accuracy, we observe a global decrease in predicted sparticle masses. However this does not affect the generic features of the minimal model outlined in our earlier work, including the characteristic light stop mass. We find stop decay channels accessible at the LHC which can be used in combination with our predicted range for the stop mixing angle to falsify the minimal model with stochastic supersymmetry. We then introduce neutrino masses and mixings consistent with experiment by including purely trilinear R-parity violating superpotential terms, resulting in a viable stochastic superspace model absent a dark matter candidate. An alternative method for generating neutrino masses, namely the type-I seesaw mechanism, is found only to be viable when the neutrino Yukawa coupling is small relative to the top Yukawa and the cut-off scale is large.

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