Strong CP Problem Solved

Today Gia Dvali and Glennys R. Farrar posted their solution on the Los Alamos electronic archive of the Srong CP problem.

This is a long standing problem in Particle Theory that makes Dvali proposal of a huge number of copies of the Standard Model more plausible.

They predict θ∼10⁻⁹. Where θ is the CP violation angle. This phenomenon was discovered by James Cronin and Val Fitch, but only for Weak interactions. The CP problem is that Strong interactions do not brake this symmetry. Dvali and Farrar now claim that also this interaction brakes the symmetry, but experimentalists will have to work harder to detect this minute effect.