标题： 六维超引力和F-理论模型的自动增强 显示英文标题

标题： Automatic Enhancement in 6D Supergravity and F-theory Models

摘要： 我们观察到，在许多F理论模型中，特定情况下调节一个特定规范群$G$和物质内容$M$会导致自动增强到更大的规范群$G' \supset G$和物质内容$M' \supset M$。 我们提出，对于任何理论$G, M$，只要存在一个不能通过Higgs机制降到$G, M$的包含理论$G', M'$，这一现象就成立。 我们给出了若干例子，包括非Higgsable规范因子、非阿贝尔规范因子、阿贝尔规范因子以及奇异物质。 在所有这些情形中，调节具有所需特征的F理论模型会产生增强或不一致性，通常是在相关的异常系数变得过大时。 这一原则适用于6D超引力“沼泽地”中的各种模型，包括一些最简单的带有 \$U(1)\$ 和 \$SU(N)\$ 规范群及通用物质的情况，以及之前文献中提出的具有更高电荷的 \$U(1)\$ 模型无限族，可能排除所有这些看似属于“沼泽地”的理论。 显示英文摘要

摘要： We observe that in many F-theory models, tuning a specific gauge group $G$ and matter content $M$ under certain circumstances leads to an automatic enhancement to a larger gauge group $G' \supset G$ and matter content $M' \supset M$. We propose that this is true for any theory $G, M$ whenever there exists a containing theory $G', M'$ that cannot be Higgsed down to $G, M$. We give a number of examples including non-Higgsable gauge factors, nonabelian gauge factors, abelian gauge factors, and exotic matter. In each of these cases, tuning an F-theory model with the desired features produces either an enhancement or an inconsistency, often when the associated anomaly coefficient becomes too large. This principle applies to a variety of models in the apparent 6D supergravity swampland, including some of the simplest cases with U(1) and SU(N) gauge groups and generic matter, as well as infinite families of U(1) models with higher charges presented in the prior literature, potentially ruling out all these apparent swampland theories.