Something about Z-penguins I want to tell

Details Something about Z-penguins I want to tell Something about Z-penguins I want to tell

2008-08-18

arxiv.org/abs/0808.2362v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Parallel talk at ICHEP08, Philadelphia, USA, July 2008. 5 pages, PDFLaTeX, 2 pdf figures and 1 table; v2: LaTeX template and r

Scientific paper

We stress that in models with constrained minimal flavor violation large negative corrections to the flavor-changing Z-penguin amplitudes are excluded by the precision measurements of the Z -> b anti-b pseudo observables performed at LEP and SLC. The derived stringent range for the non-standard contribution to the universal Inami-Lim function C leads to tight two-sided limits for the branching ratios of all Z-penguin dominated flavor-changing K- and B-decays.

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