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 - 1990 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Limits on an additional Z boson from e+e- annihilation data. / Hagiwara, K.; Najima, R.; Sakuda, Makoto; Terunuma, N.
In: Physical Review D, Vol. 41, No. 3, 1990, p. 815-823.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Limits on an additional Z boson from e+e- annihilation data
AU - Hagiwara, K.
AU - Najima, R.
AU - Sakuda, Makoto
AU - Terunuma, N.
PY - 1990
Y1 - 1990
N2 - 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).
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).
UR - http://www.scopus.com/inward/record.url?scp=0347204124&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0347204124&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.41.815
DO - 10.1103/PhysRevD.41.815
M3 - Article
AN - SCOPUS:0347204124
VL - 41
SP - 815
EP - 823
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 3
ER -