Speaker
Nikolai Husung
(CERN)
Description
Constructing minimal operator bases with prescribed transformation properties under discrete symmetries is a recurring task in lattice QCD. Examples include lattice artifacts of local operator insertions, such as the axial vector current, or the construction of interpolating fields with given quantum numbers. The Python package opbasis automates this derivation, with common lattice symmetries built in.
While originally targeted at Symanzik and related continuum EFTs with reduced lattice symmetry, the package has recently been extended to handle irreducible representations of discrete groups such as hypercubic lattice symmetry or boosted variants.
The package is available at https://github.com/nikolai-husung/opbasis.
Author
Nikolai Husung
(CERN)