1995/03/06 by Apostolos Pilaftsis, Pilaftsis, Apostolos
Computer Science · Mathematics · Physics and Astronomy · #Boson #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #Hadron #Higgs boson #High Energy Physics - Phenomenology (hep-ph) #Lepton #Mathematics #Neutrino #Nuclear physics #Observable #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Universality (dynamical systems) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9503242
published in arXiv (Cornell University) (Cornell University) · LaTeX file, 12 pages (2 Figs.), talk given at Ringberg Workshop on "Perspectives for electroweak interactions in e+e- collisions", (February 5-8, Munich (FRG), 1995)
arxiv created 1995/03/06 · openalex publication_date 1995/03/06 · arxiv updated 2016/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We examine the potential of constraining possible nondecoupling effects of heavy neutrinos and Higgs bosons at LEP and SLC that may show up in the nonoblique part of the Zlilj couplings. We analyze this type of new-physics interactions within the context of low-energy scenarios motivated by unified theories, such as the Standard Model (SM) with neutral isosinglets, the left-right symmetric model, and the minimal supersymmetric SM. Our analysis comprises a complete set of physical quantities based on the nonobservation of flavour-violating Z-boson decays, lepton universality in the decays Z→ ll, and universality of lepton asymmetries at the Z peak. It is found that these quantities form a set of complementary observables and may hence constrain the parameter space of the theories. Non-SM contributions of new-physics interactions to Rb=Γ(Z→ bb)/Γ(Z→ hadrons) are briefly discussed within these models.