Light scalars and SU(5) predictions for sin2ϑW and the proton lifetime

Kaoru Hagiwara, Francis Halzen, Ken ichi Hikasa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We investigate the dependence of the weak angle θ{symbol}W and the proton lifetime τp on the structure of the Higgs sector in the SU(5) model of grand unification. It is remarkable that only a small number of low dimensional scalar multiplets are sufficient to stabilize the proton considerably while accommodating experimental information on sin2θ{symbol}W. We present some modifications of the minimal model which predict a proton lifetime of the order of its present experimental lower bound as well as a richer particle spectrum in the 100 GeV range.

Original languageEnglish
Pages (from-to)372-376
Number of pages5
JournalPhysics Letters B
Issue number5-6
Publication statusPublished - 1984 Jul 5
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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