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arXiv 2211.01409hep-th
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EFT字符串和出现

EFT strings and emergence

Fernando Marchesano, Luca Melotti

摘要:

我们重新审视的新兴建议,在四维${\cal N}=2$向量多重态部门产生的II型字符串卡拉比-丘紧化,强调的作用,轴基本字符串,或EFT字符串。我们专注于大容量的IIA型紧化,EFT字符串出现从NS 5膜包装内部四个周期,并考虑一组无限距离模空间的限制,可以分类的缩放权重$w=1,2,3$。以前已经证明,由D2/D 0-膜组成的无限BPS粒子塔的单圈阈值效应如何产生沿着$w=3$极限的规范动力学函数的渐近行为。通过考虑D2-膜多重缠绕数,我们将这个结果推广到$w=2$极限。在$w=1$极限中,领先的塔涉及EFT弦振荡,并且通过假设带电模式在光谱中占主导地位,可以独立于EFT弦是否临界来再现弱耦合和强耦合$U(1)$的行为。

英文摘要:

We revisit the Emergence Proposal in 4d ${\cal N}=2$ vector multiplet sectors that arise from type II string Calabi--Yau compactifications, with emphasis on the role of axionic fundamental strings, or EFT strings. We focus on large-volume type IIA compactifications, where EFT strings arise from NS5-branes wrapping internal four-cycles, and consider a set of infinite-distance moduli-space limits that can be classified in terms of a scaling weight $w=1,2,3$. It has been shown before how one-loop threshold effects of an infinite tower of BPS particles made up of D2/D0-branes generate the asymptotic behaviour of the gauge kinetic functions along limits with $w=3$. We extend this result to $w=2$ limits, by taking into account D2-brane multi-wrapping numbers. In $w=1$ limits the leading tower involves EFT string oscillations, and one can reproduce the behaviour of both weakly and strongly-coupled $U(1)$'s independently on whether the EFT string is critical or not, by assuming that charged modes dominate the light spectrum.

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