Left-right symmetric gauge models and possible existence of a neutral gauge boson with mass in the PETRA-PEP energy range

1978 ◽  
Vol 73 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Q. Shafi ◽  
Ch. Wetterich
Keyword(s):  
Energy Range ◽  
Gauge Boson ◽  
Neutral Gauge Boson ◽  
Gauge Models ◽  
Symmetric Gauge

ELECTROWEAK INTERACTIONS WITH CHIRAL HYPERCHARGES

1990 ◽  
Vol 05 (27) ◽  
pp. 2241-2245
Author(s):  
SUBHASH RAJPOOT
Keyword(s):  
Gauge Boson ◽  
Neutral Current ◽  
Electroweak Interactions ◽  
Neutral Gauge Boson ◽  
Left Handed ◽  
The Right

We consider an extension of the electroweak gauge interactions from SU (2) L × U (1)Y to SU (2) L × U (1) L × U (1) R . This extension is motivated by the observed structure of the quarks and leptons, i.e., they form left-handed doublets and right-handed singlets eigenstates of electroweak interactions. In this new extension, the U (1) R serves only the right-handed singlet fermions. Consistent with the measurements of the mass of the standard massive neutral boson Z0 at the SLAC and CERN colliders and the neutral current couplings involving neutrinos and electrons, the additional massive neutral gauge boson can be as light as a few hundred GeV. The model employs the generalized see-saw mechanism to give masses to all the fermions of the theory.

CONSTRAINTS ON NEUTRAL BOSONS OF THESp(6)L⊗U(1)YMODEL

2002 ◽  
Vol 17 (09) ◽  
pp. 1273-1278 ◽  
Author(s):  
ALI A. BAGNEID
Keyword(s):  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Hadron Collider ◽  
Branching Ratio ◽  
Direct Search ◽  
Neutral Gauge Boson ◽  
Lower Limits ◽  
Hadronic Collisions

Lower limits are calculated on the mass of an additional neutral gauge boson, Z′, suggested by the Sp (6)L⊗ U (1)Ymodel, using direct search limits at hadron collider. We found that MZ′≥ 655 GeV . The production cross-section times branching ratio of Z′ decaying into dileptons in hadronic collisions, is found to be generation dependent and can be used to distinguish the model.

HEAVY LEPTON PAIR PRODUCTION FROM NEW Z’ RESONANCES

1987 ◽  
Vol 02 (04) ◽  
pp. 1189-1197
Author(s):  
J.L. Hewett ◽  
T.G. Rizzo
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Lepton Pair ◽  
Lepton Production ◽  
Heavy Lepton ◽  
Neutral Gauge Boson ◽  
Lepton Pair Production

We examine the possibility that heavy lepton pair production can be significantly enhanced by the existence of a new neutral gauge boson, Z’, at SSC energies. We find that in some models, the heavy lepton production cross section resulting from this mechanism exceeds that from production via other scenarios.

scholarly journals OBSERVABLES IN LOW-ENERGY SUPERSTRING MODELS

1986 ◽  
Vol 01 (01) ◽  
pp. 57-69 ◽  
Author(s):  
JOHN ELLIS ◽  
K. ENQVIST ◽  
D.V. NANOPOULOS ◽  
F. ZWIRNER
Keyword(s):  
Gauge Boson ◽  
Vacuum Expectation ◽  
Low Energy ◽  
Effective Theory ◽  
Expectation Values ◽  
Neutral Gauge Boson ◽  
Dynamical Generation ◽  
Gauge Hierarchy ◽  
Sneutrino Mass ◽  
The Masses

We compile phenomenological constraints on the minimal low-energy effective theory which can be obtained from the superstring by Calabi-Yau compactification. Mixing with the single additional neutral gauge boson in this model reduces the mass of the conventional Z0, Field vacuum expectation values are constrained by the experimental upper bound on this shift. Then, requiring the sneutrino mass squared to be positive constrains the scale of supersymmetry breaking more than do lower bounds on the masses of new charged particles and of sparticles. More model-dependent constraints follow from the “naturalness” requirement that observables do not depend sensitively on input parameters. We find a preference for the second neutral gauge boson to weigh ≲320 GeV, [Formula: see text] GeV and [Formula: see text] GeV. Dynamical generation of the gauge hierarchy is possible if mt≲70 GeV, with lower values of mt being favoured.

scholarly journals Anomalous neutral gauge boson interactions and simplified models

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
Tyler Corbett ◽  
Matthew J. Dolan ◽  
Christoph Englert ◽  
Karl Nordström
Keyword(s):  
Gauge Boson ◽  
Simplified Models ◽  
Neutral Gauge Boson
Sign in / Sign up

Export Citation Format

Share Document