Horizontal gauge symmetry as a natural CP-violation source at the two-generation level

Aharon Davidson, Mehmet Koca, Kameshwar C. Wali

Research output: Contribution to journalArticle

17 Citations (Scopus)

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 languageEnglish
Pages (from-to)47-51
Number of pages5
JournalPhysics Letters B
Volume86
Issue number1
DOIs
Publication statusPublished - Sep 10 1979

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CP violation
symmetry
conservation
leptons
sectors
fermions
quarks
operators

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Horizontal gauge symmetry as a natural CP-violation source at the two-generation level. / Davidson, Aharon; Koca, Mehmet; Wali, Kameshwar C.

In: Physics Letters B, Vol. 86, No. 1, 10.09.1979, p. 47-51.

Research output: Contribution to journalArticle

Davidson, Aharon ; Koca, Mehmet ; Wali, Kameshwar C. / Horizontal gauge symmetry as a natural CP-violation source at the two-generation level. In: Physics Letters B. 1979 ; Vol. 86, No. 1. pp. 47-51.
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