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Effects of heavy Majorana neutrinos and neutral vector bosons on electroweak observables

Technical Report:

Abstract

Extensions of the standard model with extra neutral vector bosons predict additional fermions. In the minimal case, where the extended gauge group is contained in the unified group SO(10), one has one right-handed neutrino for each quark-lepton generation. For this theory we systematically study the effects of both, the mixing of neutral vector bosons and the neutrino mixing, on a variety of observables used for precision tests of the electroweak theory. In most quantities the effects of neutrino and vector boson mixing tent to compensate each other. In particular the shift in the invisible width of the Z boson may be positive or negative. The most stringent bounds follow from tests for universality of the charged current. A comparable sensitivity could be attained from a measurement of the left-right asymmetry and forward-backward asymmetries at the Z pole. We emphasize the importance of measuring {tau} decays with improved accuracy. (orig.).
Publication Date:
Sep 01, 1991
Product Type:
Technical Report
Report Number:
DESY-91-102
Reference Number:
SCA: 662210; PA: DEN-92:000740; SN: 92000645619
Resource Relation:
Other Information: PBD: Sep 1991
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; WEINBERG LEPTON MODEL; MAJORANA THEORY; CHIRALITY; NEUTRAL PARTICLES; SO-10 GROUPS; PARTICLE MULTIPLETS; STANDARD MODEL; REST MASS; NEUTRINOS; Z NEUTRAL BOSONS; QUARKS; CONFIGURATION MIXING; LIMITING VALUES; LEPTONIC DECAY; PARTICLE WIDTHS; CHARGED-CURRENT INTERACTIONS; NEUTRAL-CURRENT INTERACTIONS; ANNIHILATION; PAIR PRODUCTION; ELECTRON-POSITRON INTERACTIONS; TAU PARTICLES; ASYMMETRY; ANGULAR DISTRIBUTION; LAGRANGIAN FIELD THEORY; GEV RANGE 10-100; INCLUSIVE INTERACTIONS; NEUTRINO-NUCLEON INTERACTIONS; INTEGRAL CROSS SECTIONS; WEAK CHARGED CURRENTS; 662210; UNIFIED THEORIES AND MODELS
OSTI ID:
10114247
Research Organizations:
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE92759321; TRN: DE9200740
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
32 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Buchmueller, W, Greub, C, and Kohrs, H G. Effects of heavy Majorana neutrinos and neutral vector bosons on electroweak observables. Germany: N. p., 1991. Web.
Buchmueller, W, Greub, C, & Kohrs, H G. Effects of heavy Majorana neutrinos and neutral vector bosons on electroweak observables. Germany.
Buchmueller, W, Greub, C, and Kohrs, H G. 1991. "Effects of heavy Majorana neutrinos and neutral vector bosons on electroweak observables." Germany.
@misc{etde_10114247,
title = {Effects of heavy Majorana neutrinos and neutral vector bosons on electroweak observables}
author = {Buchmueller, W, Greub, C, and Kohrs, H G}
abstractNote = {Extensions of the standard model with extra neutral vector bosons predict additional fermions. In the minimal case, where the extended gauge group is contained in the unified group SO(10), one has one right-handed neutrino for each quark-lepton generation. For this theory we systematically study the effects of both, the mixing of neutral vector bosons and the neutrino mixing, on a variety of observables used for precision tests of the electroweak theory. In most quantities the effects of neutrino and vector boson mixing tent to compensate each other. In particular the shift in the invisible width of the Z boson may be positive or negative. The most stringent bounds follow from tests for universality of the charged current. A comparable sensitivity could be attained from a measurement of the left-right asymmetry and forward-backward asymmetries at the Z pole. We emphasize the importance of measuring {tau} decays with improved accuracy. (orig.).}
place = {Germany}
year = {1991}
month = {Sep}
}