How a-type anomalies can depend on marginal couplings

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Even dimensional defects and boundaries in conformal field theory support type
a anomalies on their world volume. We show that the one-point functions of marginal operators, in the presence of defects and boundaries, are anomalous, and that the Wess-Zumino consistency condition relates them to the derivative of the a
anomaly with respect to the marginal coupling. We also argue that the constant term F for odd dimensional surfaces can depend on marginal parameters.

Original languageEnglish
Article number011601
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 2 Jan 2020


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