自然层次的标准
Criteria for Natural Hierarchies
摘要：
随着一种似乎与最小标准模型希格斯玻色子相当一致的粒子的发现，人们的注意力转向了自然性、微调以及它们对标准模型之外的物理学的意义及其在LHC运行II中的发现前景等问题。在这篇文章中，我们将重新讨论自然性的问题，讨论一些隐含的假设，这些假设是一些最常见的陈述的基础，这些陈述倾向于为某些正则化过程赋予物理意义。关于微调的模糊论点可能导致过于强烈的结论，也许不像人们希望的那样通用。相反，我们探索一个更务实的定义的层次问题，不依赖于窥视以外的量子场论的模糊边界：我们调查的电弱尺度的微调与阈值的重粒子，这是既可计算的，并依赖于性质的紫外线完成的标准模型。我们讨论了新的高能尺度的不同表现形式，这些新的高能尺度受到新物理实验提示的青睐，着眼于利用微调来确定新物理参数空间的自然区域。
英文摘要：
With the discovery of a particle that seems rather consistent with the minimal Standard Model Higgs boson, attention turns to questions of naturalness, fine-tuning, and what they imply for physics beyond the Standard Model and its discovery prospects at run II of the LHC. In this article we revisit the issue of naturalness, discussing some implicit assumptions that underly some of the most common statements, which tend to assign physical significance to certain regularization procedures. Vague arguments concerning fine-tuning can lead to conclusions that are too strong and perhaps not as generic as one would hope. Instead, we explore a more pragmatic definition of the hierarchy problem that does not rely on peeking beyond the murky boundaries of quantum field theory: we investigate the fine-tuning of the electroweak scale associated with thresholds from heavy particles, which is both calculable and dependent on the nature of the would-be ultraviolet completion of the Standard Model. We discuss different manifestations of new high-energy scales that are favored by experimental hints for new physics with an eye toward making use of fine-tuning in order to determine natural regions of the new physics parameter spaces.
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