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arXiv 1203.1968hep-th
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全息漫步中的标量介子

Scalar Mesons in Holographic Walking Technicolor

Lilia Anguelova, Peter Suranyi, L. C. Rohana Wijewardhana

摘要:

本文研究了在一定的IIB型背景下嵌入D7-anti-D7探测膜得到的步行人工色全息对偶中标量介子的能谱。标量介子产生于探测技术膜的涨落,并补充了我们在早期工作中研究的(轴向)矢量介子谱。通过明确找到标量质量的谱,我们表明,非超对称D7-反D7嵌入是稳定的,相对于这样的波动。有趣的是,在小参数展开下,标量介子谱和矢量介子谱之间的质量劈裂是次领先级的。值得注意的是,这种近简并可能不完全是由于少量的超对称性破缺,因此可能表明问题中存在其他(近似)对称性。

英文摘要:

We study the spectrum of scalar mesons in the holographic dual of walking technicolor, obtained by embedding D7 - anti-D7 probe branes in a certain type IIB background. The scalar mesons arise from fluctuations of the probe techniflavour branes and complement the (axial-)vector meson spectra that we investigated in earlier work. By explicitly finding the spectrum of scalar masses, we show that the nonsupersymmetric D7 - anti-D7 embedding is stable with respect to such fluctuations. Interestingly, it turns out that the mass splitting between the scalar and vector meson spectra is of subleading order in a small parameter expansion. It is noteworthy that this near-degeneracy may not be entirely due to a small amount of supersymmetry breaking and thus could indicate the presence of some other (approximate) symmetry in the problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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