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

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

doi:10.1103/PhysRevD.41.815

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

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

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	815-823
Number of pages	9
Journal	Physical Review D
Volume	41
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.41.815
Publication status	Published - Jan 1 1990

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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AB - 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).

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