2001/05/31 by C. Hamzaoui, Cherif Hamzaoui, Maxim Pospelov · 1 citation
Mathematics · Physics and Astronomy · #Archaeology #Context (archaeology) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Degeneracy (biology) #Geometry #Mathematics #Naturalness #Particle physics #Particle physics theoretical and experimental studies #Physics #Supersymmetry #Symmetry (geometry) #Symmetry breaking #hep-ph
paper · pdf · doi:10.1103/physrevd.65.056002
published as Phys.Rev.D65:056002,2002 · 12 pages, latex, 1 figure, references added
arxiv created 2001/05/31 · openalex publication_date 2002/01/24 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In a world without an axion, the smallness of \ensuremathθ may be achieved due to a spontaneously broken discrete left-right symmetry. We analyze the radiatively induced \ensuremathθ in the context of generic left-right symmetric supersymmetry models without assuming flavor degeneracy in the squark sector. Left-right symmetry allows us to keep \ensuremathθ within its present bound only if the intergenerational mass splitting in the squark sector at the scale of the left-right symmetry breaking is smaller than 0.5%. We also consider the naturalness of the mu=0 solution to the strong CP problem in the context of horizontal flavor symmetries. A strong bound on the combination of the horizontal charges in the up quark sector is found in this case.