Kaon weak interactions in powers of 1/Nc

Abstract

I review a recent analytic method for computing matrix elements of electroweak operators based on the large-Nc expansion. In particular, I give a rather detailed description of the matching of the quark Lagrangian onto the meson chiral Lagrangian governing K0-K0bar mixing. In the DeltaS=1 sector, I explain how to obtain an estimate for both epsilon'/epsilon and the DeltaI=1/2 rule. Finally, I give an example of how the method can also be useful for lattice calculations.

19 pages. Talk delivered at the Workshop on Large-Nc QCD 2004, Trento

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• A precision measurement of direct CP violation in the decay of neutral kaons into two pions
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Cited by in corpus (1)

• Duality violations and spectral sum rules