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Title: Infrared computations of defect Schur indices

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]
  1. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
  2. Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
  3. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences; Harvard Univ., Cambridge, MA (United States). Jefferson Physical Lab.

We conjecture a formula for the Schur index of four-dimensional N = 2 theories in the presence of boundary conditions and/or line defects, in terms of the low-energy effective Seiberg-Witten description of the system together with massive BPS excitations. We test our proposal in a variety of examples for SU(2) gauge theories, either conformal or asymptotically free. We use the conjecture to compute these defect-enriched Schur indices for theories which lack a Lagrangian description, such as Argyres-Douglas theories. We demonstrate in various examples that line defect indices can be expressed as sums of characters of the associated two-dimensional chiral algebra and that for Argyres-Douglas theories the line defect OPE reduces in the index to the Verlinde algebra.

Research Organization:
Institute for Advanced Study, Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada); Harvard Univ., Cambridge, MA (United States)
Grant/Contract Number:
SC0009988
OSTI ID:
1368084
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 11; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 54 works
Citation information provided by
Web of Science

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Cited By (6)

Schur correlation functions on S3 × S1 journal July 2019
W-algebras for Argyres–Douglas theories journal June 2017
Argyres-Douglas Theories, Chiral Algebras and Wild Hitchin Characters text January 2017
Surface Defect Indices and 2d-4d BPS States text January 2017
Surface Defects and Chiral Algebras text January 2017
BPS Graphs: From Spectral Networks to BPS Quivers text January 2017

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