1996/03/14 by Piotr H. Chankowski, P. H Chankowski, Stefan Pokorski +1 · 2 citations
Medicine · Physics and Astronomy · #Neuroendocrine Tumor Research Advances #Particle physics theoretical and experimental studies #Salivary Gland Tumors Diagnosis and Treatment #hep-ph
paper · pdf · doi:10.1016/0550-3213(96)00317-3
published as Nucl.Phys. B475 (1996) 3-26 · 32 pages (including 9 figures)
arxiv created 1996/03/14 · openalex publication_date 1996/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We re-examine the possible magnitude of the supersymmetric contribution to Rb with imposed all available phenomenological constraints and demanding good quality of the global fit to the precision electroweak data. For low tanβ we find a new region of the parameter space, with M2≈ |μ| and μ<0 where Rb remains large, ∼0.2180 even for the lighter chargino as heavy as 90-100 GeV. It is an interesting mixture of the up-higgsino and gaugino. The rôle of various phenomenological constraints is discussed in analitic form and importance of small but non-negligible left-right mixing in the stop sector is emphasized in this context. The large tanβ option for enhancement of Rb is also reviewed. The available data do not rule out this scenario.