Gauge structures beyond the standard model and 100-GeV mass region

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.35.51· OSTI ID:5961085

Cveti, M; Lynn, B W

We study various forward-backward and polarization asymmetries evaluated near the Z/sup 0/ resonance for theories with SU(2)/sub L/ x U(1)/sub Y/ x U(1)/sub Y//sub '/ and SU(2)/sub L/ x SU(2)/sub R/ x U(1)/sub B//sub -//sub L/ gauge structures. Extension to other gauge structures is very simple in our formalism. We construct a linear combination of polarized forward-backward asymmetry and polarization asymmetry with initial-state-electron longitudinal polarization whose deviation from the value of the standard model can measure the effects of new currents directly. The analysis is exact at the tree level of the theory and enables one to study any model with any Higgs sector in terms of a fixed number of parameters. The results show that for a typical class of models the measurement of different asymmetries to 1% will impose a lower bound on M/sub Z//sub '/, the mass of an additional neutral gauge boson, to be of order 10 M/sub Z/. Even much less accurate measurements will yield interesting information about new gauge structures. We also examine the implications of extended gauge structures for the precise value of the W/sup +- / mass.

• Research Organization: Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305
• OSTI ID: 5961085
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 35:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ASYMMETRY
BOSONS
DISTRIBUTION
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
GAUGE INVARIANCE
HIGGS MODEL
INTERACTIONS
INTERMEDIATE BOSONS
INVARIANCE PRINCIPLES
LEPTON-LEPTON INTERACTIONS
LIE GROUPS
MASS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
POLARIZATION
STANDARD MODEL
SU GROUPS
SU-2 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL