The B -> pi K Puzzle and New Physics
  The present B -> pi K data is studied in the context of the standard model (SM) and with new physics (NP). We confirm that the SM has difficulties explaining the B -> pi K measurements. By adopting an effective-lagrangian parametrization of NP effects, we are able to rule out several classes of NP. Our model-independent analysis shows that the B -> pi K data can be accommodated by NP in the electroweak penguin sector. 
Seungwon Baek, Philippe Hamel, David London, Alakabha Datta and Denis   A. Suprun