Constraint on Additional Neutral Gauge Bosons From Electroweak Radiative Corrections

Marciano, W.J.; Sirlin, A.

doi:10.1103/PhysRevD.35.1672

Constraint on Additional Neutral Gauge Bosons From Electroweak Radiative Corrections

W.J. Marciano
(
- Brookhaven
)
,
A. Sirlin
(
- New York U.
)

1987

5 pages

Published in:

Phys.Rev.D 35 (1987) 1672-1676

DOI:

10.1103/PhysRevD.35.1672

Report number:

BNL-38911

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Abstract: (APS)

Quantum loop corrections to the quark mixing matrix resulting from additional neutral gauge bosons are computed. Agreement between the finding ‖Vud‖2+‖Vus‖2+‖Vub2=0.9984±0.0021 and the unitarity value of 1 is used to provide a generic bound on masses and couplings of such bosons. For grand unified models of the type SO(100→SU(3)C×SU(2)L×U(1)≊U(1)X, &≳266 GeV at 90% confidence limit. That bound also applies to the extra boson in some specific E6 superstring-motivated models. In the general case of E6→SU(3)C×SU(2)L×U(1) ×U(1)η×U(1)η’ with &, we obtain the bound &≥254 GeV at 90% C.L.

Z0: POSTULATED PARTICLE
QUARK: INTERFERENCE
RADIATIVE CORRECTION
Z0: MASS
MASS: Z0
LOWER LIMIT
GRAND UNIFIED THEORY: SO(10)
GRAND UNIFIED THEORY: E(6)
UNITARITY

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