A Colorful Mirror Solution to the Strong CP Problem

2023/03/10 by Quentin Bonnefoy, Bonnefoy, Quentin, Lawrence Hall +5 · 2 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Cosmology and Gravitation Theories #Black Holes and Theoretical Physics

paper · pdf · doi:10.48550/arxiv.2303.06156

Abstract

We propose theories of a complete mirror world with parity (P) solving the strong CP problem. P exchanges the entire Standard Model (SM) with its mirror copy. We derive bounds on the two new mass scales that arise: v' where parity and mirror electroweak symmetry are spontaneously broken, and v₃ where the color groups break to the diagonal strong interactions. The strong CP problem is solved even if v₃ ≪ v^′, when heavy coloured states at the scale v₃ may be accessible at LHC and future colliders. Furthermore, we argue that the breaking of P introduces negligible contributions to θ_QCD, starting at three-loop order. The symmetry breaking at v₃ can be made dynamical, without introducing an additional hierarchy problem.

Cited by

• Clearing up the Strong CP problem
• Strong CP Phase and Parity in the Hamiltonian Formalism

Related

• Neutrinos, Dark Matter and Higgs Vacua in Parity Solutions of the strong CP problem
• Parity solves the Strong CP problem
• Solving the strong CP problem by a θ-characterized mirror symmetry
• Mirror fermions and the strong CP problem: A new axionless solution and experimental implications
• A Possible Explanation of the CP Puzzle