CONFRONTING LEFT-RIGHT SYMMETRIC MODELS WITH ELECTROWEAK PRECISION DATA AT THE Z PEAK

Abstract

In view of the recent and future electroweak precision data accumulated at LEP and SLC, we systematically analyze possible new physics effects that may occur in the leptonic sector within the context of $SU(2{)}_R\times SU(2{)}_L\times U(1{)}_{B-L}$ theories. It is shown that nonobservation of flavour-violating $Z$-boson decays, lepton universality in the decays $Z\to l\bar{l}$, and universality of lepton asymmetries at the $Z$ peak form a set of complementary observables, yielding severe constraints on the parameter space of these theories. Contributions of new-physics effects to $R_b=Γ(Z\to b\bar{b})/Γ(Z\to \mbox{hadrons})$ are found to give interesting mass relations for the flavour-changing Higgs scalars present in these models.

24 pages (4 figures available upon request)

References in corpus (13)

• Study of Constrained Minimal Supersymmetry
• Radiatively Induced Neutrino Masses and Large Higgs-Neutrino Couplings in the Standard Model with Majorana Fields
• Flavour-Violating Charged Lepton Decays in Seesaw-Type Models
• Model-Independent Global Constraints on New Physics
• Precise Measurement of the Left-Right Cross Section Asymmetry in $Z$ Boson Production by $\ee$ Collisions
• Implications of the Partial Width Z->bb for Supersymmetry Searches and Model-Building
• Universality-Breaking Effects in Leptonic Z Decays
• Supersymmetric QCD corrections to quark pair production in e+ e- annihilation
• Heavy-Neutrino Effects on tau-Lepton Decays
• Higgs Boson Contributions to Neutrino Production in e-e+ Collisions in a Left-Right Symmetric Model
• Quantum Effects on Higgs-Boson Production and Decay due to Majorana Neutrinos
• $A_{LR}$, Negative $S$, and Extended Gauge Models
• Information and Discrimination from b Quark Production on Z Resonance

Cited by in corpus (21)

• Electroweak-Scale Resonant Leptogenesis
• Heavy Neutrinos and Lepton Flavour Violation in Left-Right Symmetric Models at the LHC
• Charged Lepton Flavour Violation from Massive Neutrinos in Z Decays
• Quantization and renormalization of the manifest left-right symmetric model of electroweak interactions
• Mixing Renormalization in Majorana Neutrino Theories
• Multi-Lepton Collider Signatures of Heavy Dirac and Majorana Neutrinos
• Cumulative Non-Decoupling Effects of Kaluza-Klein Neutrinos in Electroweak Processes
• Gauge and Scheme Dependence of Mixing Matrix Renormalization
• Lepton Flavor Violation in Z and Lepton Decays in Supersymmetric Models
• Left-right symmetry in 5D and neutrino mass in TeV scale gravity models
• Electroweak Phase Transitions in left-right symmetric models
• Muon Decay to One Loop Order in the Left-Right Symmetric Model
• Phenomenological aspects of a Fermiophobic SU(2)xSU(2)xU(1) extension of the Standard Model
• Lepton-Flavor Violating Decays of the $Z$-boson in a Left-Right Supersymmetric Model
• Non-decoupling and lepton number violation in left-right models
• Gauge-Independent Analysis of K_L --> e μin Left-Right Models
• Discriminating the HTM and MLRSM models in collider studies via doubly charged Higgs boson pair production and the subsequent leptonic decays
• On-shell renormalization of the mixing matrices in Majorana neutrino theories
• Doubly charged Higgsino contribution to the decays mu-->e photon and mu-->3e and to the anomalous magnetic moment of the muon within the left-right supersymmetric model
• Testing Left-Right Symmetric Gauge Theories at e^+e^- Colliders
• The Minimal Left-Right Symmetric Model and Radiative Corrections to the Muon Decay