U(1) as the minimal horizontal gauge symmetry

Aharon Davidson*, Mehmet Koca, Kameshwar C. Wali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

85 Citations (Scopus)


A horizontal U(1) gauge symmetry is proposed to distinguish two fermionic generations. By extending the notion of generation structure to the Higgs system, and using anomaly-free conditions with the requirements of lepton-number conservation and proper Cabibbo structure, we determine Y associated with U(1), uniquely. The model can easily be generalized to account for 2N (N=1,2,) generations.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalPhysical Review Letters
Issue number2
Publication statusPublished - 1979
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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