The Kaon B-parameter in quenched QCD

Details The Kaon B-parameter in quenched QCD The Kaon B-parameter in quenched QCD

2005-10-02

arxiv.org/abs/hep-ph/0510006v1

Int.J.Mod.Phys. A21 (2006) 865-868

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, parallel talk at International Conference on QCD and Hadronic Physics, Beijing, June 2005

Scientific paper

10.1142/S0217751X06032186

I report on a recent determination by the ALPHA collaboration of the kaon B-parameter using lattice QCD with Wilson type quarks. An effort is made to control all systematic errors except for the quenched approximation. The preliminary result for the renormalization group invariant parameter is $\hat{B}_K = 0.834(37)$, which translates to $B_K^MSbar(2 GeV)=0.604(27)$ in the MSbar scheme with anticommuting $\gamma_5$.

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