Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-12-10
Phys.Rev. D61 (2000) 116010
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 2 figures
Scientific paper
10.1103/PhysRevD.61.116010
Assuming that the axion mechanism of solving the strong CP problem does not exist and the vanishing of theta at tree level is achieved by some model-building means, we study the naturalness of having large CP-violating sources in the leptonic sector. We consider the radiative mechanisms which transfer a possibly large CP-violating phase in the leptonic sector to the theta parameter. It is found that large theta cannot be induced in the models with one Higgs doublet as at least three loops are required in this case. In the models with two or more Higgs doublets the dominant source of theta is the phases in the scalar potential, induced by CP violation in leptonic sector. Thus, in the MSSM framework the imaginary part of the trilinear soft-breaking parameter A_l generates the corrections to the theta angle already at one loop. These corrections are large, excluding the possibility of large phases, unless the universality in the slepton sector is strongly violated.
Dedes Athanasios
Pospelov Maxim
No associations
LandOfFree
Theta angle versus CP violation in the leptonic sector does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theta angle versus CP violation in the leptonic sector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theta angle versus CP violation in the leptonic sector will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411208