Chiral Dynamics in the Meson Sector at two Loops

Details Chiral Dynamics in the Meson Sector at two Loops Chiral Dynamics in the Meson Sector at two Loops

2003-07-07

arxiv.org/abs/hep-ph/0307082v1

AIP Conf.Proc.698:407-410,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Talk presented at CIPANP 2003, Conference on the Intersections of Particle and Nuclear Physics, New York May 19-24, 2

Scientific paper

10.1063/1.1664268

I give a very short introduction to Chiral Perturbation Theory and an overview of the next-to-next-to-leading order three-flavour calculations done. I discuss those relevant for an improvement in the accuracy of the measurement of $V_{us}$ in more detail. One major conclusion is that all needed $p^6$ low energy constants can be obtained from experiment via the scalar form-factor in $K_{\ell3}$ decays.

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