1995/05/04 by A. A. Gvozdev, A. V. Kuznetsov, Gvozdev, A. A. +7
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9505229
9 pages, LaTeX, Talk given by A.V.Kuznetsov at the XXXth Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les Arcs, Savoie, France, March 11-18, 1995
arxiv created 1995/05/04 · openalex publication_date 1995/05/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
I report the recent studies\cite1,2 on the low--energy manifestations of a minimal extension of the Standard Model based on the quark-lepton symmetry SU(4)V ⊗ SU(2)L ⊗ GR of the Pati-Salam type. Given this symmetry the third type of mixing in the interactions ot the SU(4)V leptoquarks with quarks and leptons is shown to be required. An additional arbitrariness of the mixing parameters could allow, in principle, to decrease noticeably the lower bound on the vector leptoquark mass originated from the low-energy rare processes. The decays μ→ e γ, μ→ e γγ, and μ→ e e e via the vector leptoquark are analysed and the specific hierarchy of the decay probabilities Γ(μ→ e e e) ≫ Γ(μ→ e γγ) ≫ Γ(μ→ e γ) is shown to exist. The upper limits on the branching ratios at a level of 10-18 for the μ→ e γγ decay and at a level of 10-15 for the μ→ e e e decay are established.