Limits on an additional Z boson from e+e- annihilation data

K. Hagiwara, R. Najima, M. Sakuda, N. Terunuma

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We study the possibilities of an extra Z boson expected from E6 grand unified theories by using the most recent e+e- annihilation data up to s =57 GeV. Limits on the mass and mixing angle for the extra Z boson are discussed. We find that the data fit well for an extra Z boson whose mass is in the range 100400 GeV and which has an appreciable vector coupling to charged leptons and down-type quarks. The upper mass bound is marginal such that it disappears at the 2 level even for the most favorable model (Z).

Original languageEnglish
Pages (from-to)815-823
Number of pages9
JournalPhysical Review D
Volume41
Issue number3
DOIs
Publication statusPublished - Jan 1 1990

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Hagiwara, K., Najima, R., Sakuda, M., & Terunuma, N. (1990). Limits on an additional Z boson from e+e- annihilation data. Physical Review D, 41(3), 815-823. https://doi.org/10.1103/PhysRevD.41.815