Gauge model with light W and Z bosons

Journal Article · Fri Aug 01 04:00:00 EDT 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.22.727· OSTI ID:5238830

Barger, V; Keung, W Y; Ma, E

We show how the standard electroweak gauge model can be naturally generalized to SU(2) x U(1) x SU(2)', which has twice the number of gauge bosons of the standard model. All known fermions transform with respect to SU(2) x U(1); spontaneous symmetry breaking is achieved with a scalar quartet which links SU(2) and SU(2)' and the usual scalar doublet. The interaction Hamiltonian at low energy reproduces the low-energy phenomenology of the standard model. The high-energy predictions of the model are explored. One W and one Z are less massive than the corresponding bosons of the standard model. These light bosons are relatively narrow, with total widths typically 50 MeV. Cross sections for light Z and W production in e/sup +/e/sup -/ collisions and hadron collisions are given. A Z mass as low as 32 GeV is compatible with existing measurements; the most stringent present limit is set by the e/sup +/e/sup -/ annihilation cross section.

• Research Organization: Physics Department, University of Wisconsin at Madison, Madison, Wisconsin 53706
• OSTI ID: 5238830
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 22:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
GAUGE INVARIANCE
HAMILTONIANS
HIGGS BOSONS
INTERACTIONS
INTERMEDIATE BOSONS
INVARIANCE PRINCIPLES
LEPTON-LEPTON INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUANTUM OPERATORS
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS