We study the discrete chiral- and center-symmetry ’t Hooft anomaly matching in the charge-q two-dimensional Schwinger model. We show that the algebra of the discrete symmetry operators involves a central extension, implying the existence of q vacua, and that the chiral and center symmetries are spontaneously broken. We then argue that an axial version of the q = 2 model appears in the worldvolume theory on domain walls between center-symmetry breaking vacua in the high-temperature SU(2) N=1 super-Yang-Mills theory and that it inherits the discrete ’t Hooft anomalies of the four-dimensional bulk. The Schwinger model results suggest that the high-temperature domain wall exhibits a surprisingly rich structure: it supports a non-vanishing fermion condensate and perimeter law for spacelike Wilson loops, thus mirroring many properties of the strongly coupled four-dimensional low-temperature theory. We also discuss generalizations to theories with multiple adjoint fermions and possible lattice tests.
Anber, M. M., & Poppitz, E. (2018). Anomaly matching, (axial) Schwinger models, and high-T super Yang-Mills domain walls. Journal of High Energy Physics, 2018(9), Article 76. https://doi.org/10.1007/jhep09%282018%29076
Journal Article Type
Sep 7, 2018
Online Publication Date
Sep 13, 2018
Oct 3, 2021
Publicly Available Date
Oct 4, 2021
Journal of High Energy Physics
Scuola Internazionale Superiore di Studi Avanzati (SISSA)
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