Following Penguins

Penguins 2002 : Penguins in K !

Penguins 2002 : Penguins in K → ππ Decays a

This talk contains a short overview of the history of the interplay of the weak and the strong interaction and CP -violation. It describes the phenomenology and the basic physics mechanisms involved in the Standard Model calculations of K → ππ decays with an emphasis on the evaluation of Penguin operator matrix-elements. a Presented at the Symposium and Workshop ”Continuous Advances in QCD 2002...

Fat penguins and imaginary penguins in perturbative QCD

We evaluate B → Kπ decay amplitudes in perturbative QCD picture. It is found that penguin contributions are dynamically enhanced by nearly 50% compared to those assumed in the factorization approximation. It is also shown that annihilation diagrams are not negligible, and give large strong phases. Our results for branching ratios of B → Kπ decays for a representative parameter set are consisten...

Modeling Huddling Penguins

We present a systematic and quantitative model of huddling penguins. In this mathematical model, each individual penguin in the huddle seeks only to reduce its own heat loss. Consequently, penguins on the boundary of the huddle that are most exposed to the wind move downwind to more sheltered locations along the boundary. In contrast, penguins in the interior of the huddle neither have the spac...

Penguins: Paradoxes and Patterns

Penguins are often considered to be as ecologically and behaviourally homogenous as their morphology. Their structural morphology and associated physiological adaptations are governed by the demands of operating as flightless, subsurface marine predators. However, within the very strict constraints of this life-form, penguins in fact show considerable ecological and behavioural heterogeneity. S...