Lattice definition of chiral gauge theories
The weak force treats left-handed and right-handed particles differently. Nobody knows how to place such a theory on a grid of spacetime points for computer simulation without destroying that difference or its symmetry.
Why it matters
Without it the Standard Model has no complete nonperturbative definition, and strongly coupled chiral theories cannot be simulated.
Review
M. Luscher, Chiral gauge theories revisited, Subnucl. Ser. 38, 41, 2002. https://arxiv.org/abs/hep-th/0102028 reference checked
Timestamp record
- Signed record
- 09ed7291202c…
- Public log
- Entry 317, in checkpoint 2,123
- In the log by
- Block 969,698, 2026-10-03
This text was in the PubPhys log by that date. The date says nothing about when the problem was first posed.