Precision computation of B_K in quenched lattice QCD

2004/09/08 by P. Dimopoulos, Dimopoulos, P., J. Heitger +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #hep-lat

paper · pdf · doi:10.48550/arxiv.hep-lat/0409026

3 pages, 3 figures, talk presented at Lattice2004(weak), Fermilab, June 21-26, 2004

arxiv created 2004/09/08 · arxiv updated 2009/12/01

Abstract

We present the results of a precision computation of B_K with Wilson fermions. Simulations are performed at different lattice spacings, enabling continuum limit extrapolations. Two different twisted mass QCD (tmQCD) regularisations are considered for the computation of bare matrix elements. In both cases the relevant four-fermion operator renormalises multiplicatively. In one regularisation it is possible to perform the computation directly at the physical kaon mass value, thus avoiding extrapolations in the mass. Nonperturbative renormalisation is carried out using available Schroedinger Functional results.

Related

• Precision Lattice Computations in the Heavy Quark Sector
• Renormalization of quark propagator, vertex functions and twist-2 operators from twisted-mass lattice QCD at N_f=4
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• High-accuracy two-loop computation of the critical mass for Wilson fermions
• B meson decay constant from quenched Lattice QCD