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arXiv 1402.1328hep-ph
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具有higgsino暗物质和统一约束的MSSM中的低精细调谐

Low fine tuning in the MSSM with higgsino dark matter and unification constraints

Kamila Kowalska, Leszek Roszkowski, Enrico Maria Sessolo, Sebastian Trojanowski

摘要:

我们研究的问题,在MSSM与大统一体尺度边界条件的微调。我们确定了具体的统一模式和质量关系,可以导致一个显着降低的微调由于gauginos,标量和μ参数,相对于最简单的统一条件。我们专注于一个现象学上有趣的区域,这是有利于希格斯质量和遗物密度的暗物质是一个几乎纯的希格斯诺与μ~1 TeV的质量,而标量和gauginos的质量在多TeV的制度。在那里,我们发现微调可以减少到百分之几的水平。尽管胶子的质量大约为2 TeV,但由此产生的质谱将很难在大型强子对撞机上进行探索,但暗物质直接探测实验具有良好的探测前景。最后,我们展示了一个具体的例子,如何条件和质量关系给予低微调可以起源于超引力和大统一理论的背景下。

英文摘要:

We examine the issue of fine tuning in the MSSM with GUT-scale boundary conditions. We identify specific unification patterns and mass relations that can lead to a significant lowering of the fine tuning due to gauginos, scalars, and the μ parameter, relative to the simplest unification conditions. We focus on a phenomenologically interesting region that is favored by the Higgs mass and the relic density where the dark matter is a nearly pure higgsino with mass given by μ~1 TeV while the scalars and gauginos have masses in the multi-TeV regime. There, we find that the fine tuning can be reduced to the level of a few percent. Despite the gluino mass in the ballpark of 2 TeV, resulting mass spectra will be hard to explore at the LHC, but good prospects for detection come from dark matter direct detection experiments. Finally, we demonstrate with a specific example how the conditions and mass relations giving low fine tuning can originate in the context of supergravity and Grand Unified Theories.

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