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 language | English |
|---|---|
| Pages (from-to) | 815-823 |
| Number of pages | 9 |
| Journal | Physical Review D |
| Volume | 41 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 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