6533b820fe1ef96bd12798e3

RESEARCH PRODUCT

Matrix elements of decays

G. MartinelliV. GimenezV. LubiczPh. BoucaudChi-jen LinC.t. SachrajdaM. Papinutto

subject

PhysicsNuclear and High Energy PhysicsParticle physicsPhysical pointChiral perturbation theoryHigh Energy Physics::LatticeLattice (order)Quantum electrodynamicsComputationElectroweak interactionFermionAtomic and Molecular Physics and Optics

description

We present a numerical computation of matrix elements of ?I = 3/2 K ? ?? decays by using Wilson fermions. In order to extrapolate to the physical point we work at unphysical kinematics and we resort to Chiral Perturbation Theory at the next-to-leading order. In particular we explain the case of the electroweak penguins 07,8 which can contribute significantly in the theoretical prediction of sol|??/?. The study is done at ? = 6.0 on a 243 × 64 lattice.

https://doi.org/10.1016/s0920-5632(03)02567-2