Neutral Current Couplings and SU(2) X U(1) Gauge Models

Roos, Matts; Liede, Ilkka

doi:10.1016/0370-2693(79)90432-5

Neutral Current Couplings and SU(2) X U(1) Gauge Models

Matts Roos
(
- Helsinki U.
)
,
Ilkka Liede
(
- Helsinki U.
)

Jan, 1979

6 pages

Published in:

Phys.Lett.B 82 (1979) 89-94

Published: 1979

DOI:

10.1016/0370-2693(79)90432-5

Report number:

HU-TFT-78-40

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Abstract: (Elsevier)

Combining neutral current (NC) data in a statistically correct way we determine: (i) the weak NC couplings in neutrino-nucleon and -electron scattering independently of gauge models; (ii) the weak isospin T 3 of the right-handed fermions u R , d R and e R , the Z mass, and sin 2 θ W in SU(2) ⊗ U(1) models with standard left-handed fermion multiplet assignment two Higgs doublets. Both determinations support the Weinberg-Salam model, although neither considerable right-handed fermion singlet-doublet mixing involving new heavy fermions can be excluded, nor the existence of a second Higgs doublet.

GAUGE FIELD THEORY: SU(2) X U(1)
FIELD THEORETICAL MODEL: WEINBERG
COUPLING CONSTANT: NEUTRAL CURRENT
COUPLING CONSTANT: FACTORIZATION
NEUTRINO NUCLEON: INTERACTION
INTERACTION: NEUTRINO NUCLEON
NEUTRINO ELECTRON: ELASTIC SCATTERING
ELASTIC SCATTERING: NEUTRINO ELECTRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON

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