Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-30
Nucl.Phys. B513 (1998) 517-554
Physics
High Energy Physics
High Energy Physics - Phenomenology
44 pages, LaTeX, six encapsulated figures included
Scientific paper
10.1016/S0550-3213(97)00764-5
The lepton-flavour-violating decay K_L --> e \mu is studied in detail within the context of SU(2)_R x SU(2)_L x U(1)_(B-L) models, which include heavy Majorana neutrinos. Particular attention is paid to the gauge independence of this decay process to one loop. In analogy with earlier studies on the K^0\bar{K}^0 mixing, it is explicitly shown how restoration of gauge invariance occurs in the decay amplitude containing the box diagrams, when the relevant Higgs-dependent self-energy and vertex graphs are taken into account in the on-shell skeleton renormalization scheme. Based on the analytic expressions so derived, we find that the branching ratio B(K_L --> e \mu) can be considerably enhanced due to the presence of left- and right-handed currents in the loop, and can reach values close to or even larger than the present experimental limit 3.3 x 10^{-11} in the manifest left-right symmetric model. Constraints on the parameter space of typical left-right models are derived from the possible decay K_L --> e \mu and a global analysis of other low-energy data.
Gagyi-Palffy Zoltan
Pilaftsis Apostolos
Schilcher Karl
No associations
LandOfFree
Gauge-Independent Analysis of K_L --> e μin Left-Right Models 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 Gauge-Independent Analysis of K_L --> e μin Left-Right Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge-Independent Analysis of K_L --> e μin Left-Right Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-680212