Extra neutral gauge bosons and Higgs bosons in an E_6-based model

Details Extra neutral gauge bosons and Higgs bosons in an E_6-based model Extra neutral gauge bosons and Higgs bosons in an E_6-based model

2001-02-12

arxiv.org/abs/hep-ph/0102139v2

Phys.Rev. D64 (2001) 073015

Physics

High Energy Physics

High Energy Physics - Phenomenology

version to appear in Phys. Review D

Scientific paper

10.1103/PhysRevD.64.073015

Extra neutral gauge bosons and Higgs bosons in an effective low-energy $SU(2)_L \times SU(2)_I \times U(1)_Y \times U(1)_{Y^{\prime}}$ model, which is a subgroup of $E_6$, are studied. $SU(2)_I$ is a subgroup of $SU(3)_R$ and commutes with the electric charge operator, so the three corresponding gauge bosons are neutral. Electroweak precision experiments are used to put constraints on masses of the extra neutral gauge bosons and on the mixings between them and the ordinary Z boson, including constraints arising from a proposed measurment of the weak charge of the proton at Jefferson Lab. Bounds on and relationships of masses of Higgs bosons in the supersymmetric version of the model are also discussed.

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