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Title: New dualities and misleading anomaly matchings from outer-automorphism twists

Journal Article · · Journal of High Energy Physics (Online)

We study four-dimensional N=1, 2 superconformal theories in class S obtained by compactifying the 6d N=(2, 0) theory on a Riemann surface C with outer-automorphism twist lines. From the pair-of-pants decompositions of C, we find various dual descriptions for the same theory having distinct gauge groups. We show that the various configurations of the twist line give rise to dual descriptions for the identical theory. We compute the ’t Hooft anomaly coefficients and the superconformal indices to test dualities. Surprisingly, we find that the class S theories with twist lines wrapping 1-cycles of C have the identical ’t Hooft anomalies as the ones without the twist line, whereas the superconformal indices differ. As a result, this provides a large set of examples where the anomaly matching is insufficient to test dualities.

Research Organization:
Univ. of California, San Diego, La Jolla, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0009919
OSTI ID:
1361192
Journal Information:
Journal of High Energy Physics (Online), Vol. 2017, Issue 3; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Cited By (3)

2D CFT blocks for the 4D class S k $$ {\mathcal{S}}_k $$ theories journal August 2017
2D CFT blocks for the 4D class $\mathcal{S}_k$ theories text January 2017
2D CFT blocks for the 4D class $\mathcal{S}_k$ theories text January 2017

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