A possible anthropic solution to the Strong CP problem
High Energy Physics - Phenomenology
2009-05-30 v3 Astrophysics
High Energy Physics - Theory
Abstract
We point out that the long-standing strong CP problem may be resolved by an anthropic argument. The key ideas are: (i) to allow explicit breaking(s) of the Peccei-Quinn symmetry which reduces the strong CP problem to the cosmological constant problem, and (ii) to conjecture that the probability distribution of the vacuum energy has a mild pressure towards higher values. The cosmological problems of the (s)axion with a large Peccei-Quinn scale are absent in our mechanism, since the axion acquires a large mass from the explicit breaking.
Keywords
Cite
@article{arxiv.0804.2478,
title = {A possible anthropic solution to the Strong CP problem},
author = {Fuminobu Takahashi},
journal= {arXiv preprint arXiv:0804.2478},
year = {2009}
}
Comments
22 pages, 2 figures.v2: references added.v3:a version to appear in Progress of Theoretical Physics