The Strong CP Problem as a Pentagonal Selection Rule: θQCD = 0 from Dihedral Symmetry of the Collapse Eigenmode

Key Points

• The aim is to address the strong CP problem by demonstrating that θ_QCD is zero due to specific symmetry properties.
• Utilization of dihedral symmetry principles
• Analysis of eigenmodes in relation to CP violation
• Theoretical framework involving k modes
• θ_QCD is confirmed to be zero due to even modes of the pentagon
• Odd modes are linked to the breakdown of reflection symmetry
• No need for axions to explain CP violation