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`'on physics from lattice simulations 

Abstract: 
In the last years, enormous progress have been made by the lattice
community, in particular in the kaon sector. The simulations have become
realistic and new techniques have been developed, allowing us to have a
better control on the systematic errors, but also to access new quantities.
I will present a selection of recent lattice results and their
phenomenological impact in the quest for new physics.
In particular I will report on the computation of K-> pi pi decays
achieved by the RBC-UKQCD collaborations, which is relevant for the
study of direct and indirect CP violation. The DeltaI=3/2 part of this
computation has been performed with a realistic setup, and represents
the first "ab initio" calculation of a hadronic weak decay.

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