Chiral symmetry and Atiyah-Patodi-Singer index theorem for staggered fermions
Journal Article
·
· TBD
OSTI ID:2407100
- North Carolina State U.
- Fermilab
We consider the Atiyah-Patodi-Singer (APS) index theorem corresponding to the chiral symmetry of a continuum formulation of staggered fermions called Kähler-Dirac fermions, which have been recently investigated as an ingredient in lattice constructions of chiral gauge theories. We point out that there are two notions of chiral symmetry for Kähler-Dirac fermions, both having a mixed perturbative anomaly with gravity leading to index theorems on closed manifolds. By formulating these theories on a manifold with boundary, we find the APS index theorems corresponding to each of these symmetries, necessary for a complete picture of anomaly inflow, using a recently discovered physics-motivated proof. We comment on a fundamental difference between the nature of these two symmetries by showing that a sensible local, symmetric boundary condition only exists for one of the two symmetries. This sheds light on how these symmetries behave under lattice discretization, and in particular on their use for recent symmetric-mass generation proposals.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 2407100
- Report Number(s):
- FERMILAB-PUB-24-0262-T; arXiv:2405.11348; oai:inspirehep.net:2788151
- Journal Information:
- TBD, Journal Name: TBD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chiral anomaly for the Dirac operator in an instanton background via the Atiyah-Patodi-Singer theorem
Fermion chiral anomaly and Atiyah-Patodi-Singer index for spherical spacetime boundaries
Chiral asymmetry and the Atiyah-Patodi-Singer index for the Dirac operator on a four-dimensional ball
Journal Article
·
Thu Oct 15 00:00:00 EDT 1987
· Phys. Rev. D; (United States)
·
OSTI ID:6084034
Fermion chiral anomaly and Atiyah-Patodi-Singer index for spherical spacetime boundaries
Thesis/Dissertation
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:5217951
Chiral asymmetry and the Atiyah-Patodi-Singer index for the Dirac operator on a four-dimensional ball
Journal Article
·
Mon Jun 15 00:00:00 EDT 1987
· Phys. Rev. D; (United States)
·
OSTI ID:6058226