Abstract
We show that the classification of the WS-GIM generations by horizontal gauge symmetries can give rise to CP violation already at the two-generation level. The smallness of the CP-violation phase associated with the K0-K0 system is correlated with the smallness of the physical Cabibbo-like angle which emerges in the up-quark sector. We argue that strict lepton number conservation severely restricts the horizontal symmetries and requires a non-trivial vertical structure. The effective lowest-order four-fermion CP-violating operator is calculated in a recently proposed (SU(2) × U(1)) × U′ (1) model.
| Original language | English |
|---|---|
| Pages (from-to) | 47-51 |
| Number of pages | 5 |
| Journal | Physics Letters B |
| Volume | 86 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Sep 10 1979 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Davidson, A., Koca, M., & Wali, K. C. (1979). Horizontal gauge symmetry as a natural CP-violation source at the two-generation level. Physics Letters B, 86(1), 47-51. https://doi.org/10.1016/0370-2693(79)90618-X