K^0-\bar{K}^0 Mixing Beyond the SM from Nf=2 tmQCD

Details K^0-\bar{K}^0 Mixing Beyond the SM from Nf=2 tmQCD K^0-\bar{K}^0 Mixing Beyond the SM from Nf=2 tmQCD

2010-12-15

arxiv.org/abs/1012.3355v1

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 2 figures; presented at the XXVIII International Symposium on Lattice Field Theory Villasimius, Sardinia, Italy

Scientific paper

We present preliminary results on the of neutral kaon oscillations in extensions of the Standard Model. Using Nf=2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks, we achieve both O(a)-improvement and continuum-like renormalization pattern for the relevant four-fermion operators. We perform simulations at three values of the lattice spacing and extrapolate/interpolate our results to the continuum limit and physical light/strange quark mass. The calculation of the renormalization constants of the complete operator basis is performed non- perturbatively in the RI-MOM scheme.

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