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arXiv 1408.6745hep-th
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6d,N=(1,0)库仑分支Anomaly匹配

6d, N=(1,0) Coulomb Branch Anomaly Matching

Kenneth Intriligator

摘要:

6d QFT受t Hooft异常匹配的约束:对于整体对称性和度量背景的所有异常都是RG流的常数,并且对于模空间中的所有真空都是常数.讨论了6dN =(1,0)理论在库仑分支上的反常匹配机制.它是Green-Schwarz-West-Sagnotti异常抵消的全局对称性模拟,并且要求表观异常失配是完美的正方形,$ΔI_8={1\over 2}X_4^2$。然后通过使$X_4$成为张量多重态的电/磁源来抵消$ΔI_8$,因此背景规范场瞬子产生带电弦。这需要对$X_4$中的系数进行整体量化。我们用N=(2,0)理论来说明这一点。我们还考虑了N个小$E_8$瞬子的N=(1,0)SCFT,验证了最近关于其反常多项式的结果符合反常匹配机制.

英文摘要:

6d QFTs are constrained by the analog of 't Hooft anomaly matching: all anomalies for global symmetries and metric backgrounds are constants of RG flows, and for all vacua in moduli spaces. We discuss an anomaly matching mechanism for 6d N=(1,0) theories on their Coulomb branch. It is a global symmetry analog of Green-Schwarz-West-Sagnotti anomaly cancellation, and requires the apparent anomaly mismatch to be a perfect square, $ΔI_8={1\over 2}X_4^2$. Then $ΔI_8$ is cancelled by making $X_4$ an electric / magnetic source for the tensor multiplet, so background gauge field instantons yield charged strings. This requires the coefficients in $X_4$ to be integrally quantized. We illustrate this for N=(2,0) theories. We also consider the N=(1,0) SCFTs from N small $E_8$ instantons, verifying that the recent result for its anomaly polynomial fits with the anomaly matching mechanism.

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