Limits on an additional Z boson from e sup + sup e sup minus annihilation data

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.815· OSTI ID:7243586

Sakuda, M ^[1]; Terunuma, N ^[2]

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1. KEK, Tsukuba 305, (Japan)
2. Department of Physics, Hiroshima University, Hiroshima 730, (Japan)

We study the possibilities of an extra {ital Z} boson expected from E{sub 6} grand unified theories by using the most recent {ital e}{sup +}{sup e}{sup {minus}} annihilation data up to {radical}{ital s} =57 GeV. Limits on the mass and mixing angle for the extra {ital Z} boson are discussed. We find that the data fit well for an extra {ital Z} boson whose mass is in the range 100--400 GeV and which has an appreciable vector coupling to charged leptons and down-type quarks. The upper mass bound is marginal such that it disappears at the 2{sigma} level even for the most favorable model ({ital Z}{sub {chi}}).

• OSTI ID: 7243586
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 41:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
EIGENSTATES
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
FUNCTIONS
GEV RANGE
GEV RANGE 10-100
GRAND UNIFIED THEORY
INTERACTIONS
LAGRANGIAN FUNCTION
LEPTON-LEPTON INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
SU GROUPS
SU-2 GROUPS
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES