6533b82cfe1ef96bd12900fb
RESEARCH PRODUCT
Kaon weak matrix elements with Wilson fermions
Damir BecirevicMauro PapinuttoGuido MartinelliChristopher T. SachrajdaC.-j.d. LinVittorio LubiczPh. BoucaudV. Gimenezsubject
PhysicsNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesFísicaFermionAtomic and Molecular Physics and OpticsSettore FIS/02 - Fisica Teorica Modelli e Metodi MatematiciHigh Energy Physics - LatticeLow energyLattice (order)High Energy Physics::Experimentdescription
We present results of several numerical studies with Wilson fermions relevant for kaon physics. We compute the B_K parameter by using two different methods and extrapolate to the continuum limit. Our preliminary result is B_K(2 GeV)=0.66(7). Delta I=3/2 K->pi pi matrix elements are obtained by using the next-to-leading order expressions derived in chiral perturbation theory in which the low energy constants are determined by the lattice results computed at unphysical kinematics. From the simulation at beta=6.0 our (preliminary) results read: _{I=2}=0.14(1)(1) GeV^3 and _{I=2}=0.69(6)(6) GeV^3.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-09-18 |