6533b837fe1ef96bd12a1d27

RESEARCH PRODUCT

Extraction of K --> pi pi matrix elements with Wilson fermions

Ph. BoucaudV. GimenezC. J. D. LinV. LubiczG. MartinelliM. PapinuttoF. RapuanoC. T. SachrajdaS. P. Qcd R. Collaboration

subject

PhysicsNuclear and High Energy PhysicsFinite volume methodComputationHigh Energy Physics::LatticeFermionAtomic and Molecular Physics and OpticsRenormalizationFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIsymbols.namesakePionHigh Energy Physics - Latticelattice qcdLattice (order)visual_artvisual_art.visual_art_mediumsymbolsFísica nuclearHamiltonian (quantum mechanics)GoldstoneMathematical physics

description

We present the status of a lattice calculation for the K-->pipi matrix elements of the (delta S=1) effective weak Hamiltonian, directly with two pion in the final state. We study the energy shift of two pion in a finite volume both in the I=0 and I=2 channels. We explain a method to avoid the Goldstone pole contamination in the computation of renormalization constants for (delta I=3/2) operators. Finally we show some preliminary results for the matrix elements of (delta I=1/2) operators. Our quenched simulation is done at beta=6.0, with Wilson fermions, on a (24^3 X 64) lattice.

yearjournalcountryeditionlanguage
2001-10-19
10.1016/s0920-5632(01)01702-9http://hdl.handle.net/20.500.11767/33336