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arXiv 1604.01255hep-phhep-th
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QCD轴子是弦论和味物理之间的桥梁

QCD Axion as a Bridge Between String Theory and Flavor Physics

Y. H. Ahn

摘要:

我们构建了一个字符串启发的模型,由风味Peccei-Quinn(PQ)轴子的动机,作为一个有用的桥梁之间的风味物理和弦论。其关键特征是两个反常规范$U(1)$对称性,这两个对称性同时负责标准模型的费米子质量等级问题和强CP问题,它们将弦论与味物理结合起来,并严格限制了F项和D项对势的贡献。在超对称模稳定的背景下,我们稳定的大小模与积极的质量,而离开两个轴子质量和一个轴子质量。我们证明,虽然大规模的规范玻色子吃两个轴向自由度,两个轴向生存到低能量的风味PQ轴子。

英文摘要:

We construct a string-inspired model, motivated by the flavored Peccei-Quinn (PQ) axions, as a useful bridge between flavor physics and string theory. The key feature is two anomalous gauged $U(1)$ symmetries, responsible for both the fermion mass hierarchy problem of the standard model and the strong CP problem, that combine string theory with flavor physics and severely constrain the form of the F- and D-term contributions to the potential. In the context of supersymmetric moduli stabilization we stabilize the size moduli with positive masses while leaving two axions massless and one axion massive. We demonstrate that, while the massive gauge bosons eat the two axionic degrees of freedom, two axionic directions survive to low energies as the flavored PQ axions.

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