Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-11-08
Physics
High Energy Physics
High Energy Physics - Lattice
12 pages. Invited talk presented at the 6th International Workshop on Chiral Dynamics (CD09), Bern, Switzerland, July 6-10, 20
Scientific paper
I review recent lattice results in kaon physics, particularly in the determination of V_{us} and the B_K parameter of K^0-\bar{K}^0 mixing. I use lattice data to argue for the need of developing SU(2)_L \times SU(2)_R chiral perturbation theory for kaon physics and discuss some recent progress in achieving this. In particular it is shown that for K_{\ell 3} decays at q^2=0 (where q is the momentum transfer between the kaon and the pion), the chiral logarithms can be calculated in spite of the fact that the external pion carries half the energy of the kaon (in the kaon's rest frame), because these logarithms arise from soft internal loops. Future prospects, including applications to K\to\pi\pi decays are discussed. The need to define and exploit renormalization schemes which can simultaneously be implemented numerically in lattice simulations and used in higher-order perturbative calculations is explained.
No associations
LandOfFree
Kaons on the lattice does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Kaons on the lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kaons on the lattice will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-659613