全息重轻介子的超精细分裂和塞曼效应
Hyperfine Splitting and the Zeeman Effect in Holographic Heavy-Light Mesons
摘要：
利用AdS/CFT对应研究了变形N = 2超Yang-Mills理论中重轻介子的质量谱。我们展示了如何在超对称性破缺后，超对称介子谱的一些简并可以被去除，从而导致超精细结构的出现。我们所考虑的显式超对称破缺情形，一方面是将两个基本D7膜中的一个倾斜到内部R^6空间中，另一方面是在（未倾斜的）膜上施加一个外部磁场。后一种情况导致了众所周知的塞曼效应，我们检查弱和强磁场。
英文摘要：
We inspect the mass spectrum of heavy-light mesons in deformed N=2 super Yang-Mills theory using the AdS/CFT correspondence. We demonstrate how some of the degeneracies of the supersymmetric meson spectrum can be removed upon breaking the supersymmetry, thus leading to the emergence of hyperfine structure. The explicit SUSY breaking scenarios we consider involve on one hand tilting one of the two fundamental D7 branes inside the internal R^6 space, and on the other hand applying an external magnetic field on the (untilted) branes. The latter scenario leads to the well-known Zeeman effect, which we inspect for both weak and strong magnetic fields.
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