Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks

Details Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks

2009-10-26

arxiv.org/abs/0910.4838v1

PoS LAT2009:258,2009

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures, 1 table, proceedings of the XXVII Int'l Symposyum on Lattice Field Theory (LAT2009), July 26-31 2009, Peki

Scientific paper

We compute non-perturbatively the B-parameters of the complete basis of four-fermion operators needed to study the Kaon oscillations in the SM and in its supersymmetric extension. We perform numerical simulations with two dynamical maximally twisted sea quarks at three values of the lattice spacing on configurations generated by the ETMC. Unwanted operator mixings and O(a) discretization effects are removed by discretizing the valence quarks with a suitable Osterwalder-Seiler variant of the Twisted Mass action. Operators are renormalized non-perturbatively in the RI/MOM scheme. Our preliminary result for BK(RGI) is 0.73(3)(3).

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