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arXiv 1811.00580hep-th
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关于Orbifolds上闭弦空间群选择规则的注记

Note on the space group selection rule for closed strings on orbifolds

Saul Ramos-Sanchez, Patrick K. S. Vaudrevange

摘要:

众所周知,空间群选择规则限制了闭弦在轨道上的相互作用。对于一些示例,该规则已经通过有效阿贝尔对称性来描述,该有效阿贝尔对称性与置换对称性组合到非阿贝尔风味对称性,如$D_4$或$Δ(54)$。然而,有效阿贝尔对称的一般情况尚未完全理解。在这项工作中,我们形式化的阿贝尔对称性的计算,结果从空间群选择规则,只施加两个条件:(i)定义良好的离散电荷和(ii)他们的保守。由此产生的对称性,我们称之为空间群味对称性$D_S$,由空间群的阿贝尔化唯一指定。对于所有具有$N=1$超对称性的阿贝尔轨道折叠,我们计算了$D_S$,并确定了新的情况,例如,$D_S$包含一个$Z_2$暗物质-奇偶性,分别为无质量和有质量的弦,电荷为0和1。

英文摘要:

It is well-known that the space group selection rule constrains the interactions of closed strings on orbifolds. For some examples, this rule has been described by an effective Abelian symmetry that combines with a permutation symmetry to a non-Abelian flavor symmetry like $D_4$ or $Δ(54)$. However, the general case of the effective Abelian symmetries was not yet fully understood. In this work, we formalize the computation of the Abelian symmetry that results from the space group selection rule by imposing two conditions only: (i) well-defined discrete charges and (ii) their conservation. The resulting symmetry, which we call the space group flavor symmetry $D_S$, is uniquely specified by the Abelianization of the space group. For all Abelian orbifolds with $N=1$ supersymmetry we compute $D_S$ and identify new cases, for example, where $D_S$ contains a $Z_2$ dark matter-parity with charges 0 and 1 for massless and massive strings, respectively.

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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