0000000000851093

AUTHOR

F. Rapuano

showing 2 related works from this author

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

2001

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.

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
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K --> pi pi matrix elements beyond the leading-order chiral expansion

2002

We propose an approach for calculating $K\to\pi\pi$ decays to the next-to-leading order in chiral expansion. A detailed numerical study of this approach is being performed.

PhysicsFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIHigh Energy Physics - PhenomenologyNuclear and High Energy PhysicsMatrix (mathematics)High Energy Physics - LatticePiOrder (ring theory)FísicaLattice QCDAtomic and Molecular Physics and OpticsMathematical physics
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