6533b851fe1ef96bd12a8f97

RESEARCH PRODUCT

Matrix elements of (delta S=2) operators with Wilson fermions

Ph. BoucaudM. PapinuttoGimenezVittorio LubiczD. BecirevicG. Martinelli

subject

PhysicsNuclear and High Energy PhysicsHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesFísicaFermionAtomic and Molecular Physics and OpticsHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)AmplitudeHigh Energy Physics - LatticeLattice (order)PiMathematical physics

description

We test the recent proposal of using the Ward identities to compute the K0-K0bar mixing amplitude with Wilson fermions, without the problem of spurious lattice subtractions. From our simulations, we observe no difference between the results obtained with and without subtractions. In addition, from the standard study of the complete set of (delta S=2) operators, we quote the following (preliminary) results (in the MS(NDR) scheme): Bk(2 GeV)=0.70(10), < O7^{3/2}>_{K->pi pi} = 0.10(2)(1) GeV^3, < O8^{3/2}>_{K->pi pi} = 0.49(6)(0) GeV^3.

yearjournalcountryeditionlanguage
2002-01-01
10.1016/s0920-5632(01)01703-0http://arxiv.org/abs/hep-lat/0110006