Theorie-Palaver

Dec. 17, 2007 at 2:30 p.m. in Sozialraum der WA ThEP

Upalaparna Banerjee

Federico Gasparotto

Pouria Mazloumi

Yong Xu

How to kill a penguin
PD Dr. Ulrich Haisch (Zürich)


Within constrained minimal-flavor-violation the large destructive flavor-changing Z-penguin managed to survive eradication so far. We give a incisive description of how to kill it using the precision measurements of the Z -> b anti-b pseudo observables. 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.