CP symmetry and the strong interactions

Details CP symmetry and the strong interactions CP symmetry and the strong interactions

2003-03-28

arxiv.org/abs/hep-th/0303254v2

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, 3 figures, revtex; revisions for clarity

Scientific paper

I discuss several aspects of CP non-invariance in the strongly interacting theory of quarks and gluons. I use a simple effective Lagrangian technique to map out the region of quark masses where CP symmetry is spontaneously broken. I then turn to the possible explicit CP violation arising from a complex quark mass. After summarizing the definition of the renormalized theory as a limit, I argue that attempts to remove the CP violation by making the lightest quark mass vanish are not well defined. I close with some warnings for lattice simulations.

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