B^0-\bar{B}^0 mixing with quenched lattice NRQCD

Details B^0-\bar{B}^0 mixing with quenched lattice NRQCD B^0-\bar{B}^0 mixing with quenched lattice NRQCD

2000-10-31

arxiv.org/abs/hep-lat/0010089v2

Nucl.Phys.Proc.Suppl. 94 (2001) 379-382

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2000 (Heavy Quark Physics), 4 pages, 4 eps-figures, Latex, typo corrected

Scientific paper

10.1016/S0920-5632(01)00980-X

We present our recent results for the B-parameters, which parameterize the \Delta B=2 transition amplitudes. Calculations are made in quenched QCD at \beta=5.7, 5.9, and 6.1, using NRQCD for heavy quark and the $O(a)$-improved action for light quark. The operators are perturbatively renormalized including corrections of O(\alpha_s/am_Q). We examine scaling behavior of the B-parameters in detail, and discuss the systematic uncertainties using scatter of results with different analysis procedures adopted. As a result, we find B_{B_d}(m_b)=0.84(2)(8), B_{B_s}/B_{B_d}=1.017(10)(^{+4}_{-0}) and B_{S_s}(m_b)=0.87(1)(9)(^{+1}_{-0}) in the quenched approximation.

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