Speaker
Maarten Golterman
(San Francisco State University)
Description
When a subgroup of the flavor symmetry group of a gauge theory is
weakly coupled to additional gauge fields, the vacuum tends to
align such that the gauged subgroup is unbroken. At the same time,
the lattice discretization typically breaks the flavor symmetry
explicitly, and can give rise to new lattice-artifact phases with
spontaneously broken symmetries. We discuss the interplay of these
two phenomena, using chiral lagrangian techniques. Our main
example is two-flavor Wilson QCD coupled to electromagnetism. We
will briefly touch on theories with staggered fermions and
composite Higgs models as well.
Primary author
Maarten Golterman
(San Francisco State University)
Co-author
Yigal Shamir
(Tel-Aviv University)
