Search results for "Two-form"

showing 2 items of 2 documents

Nonperturbative structure of the ghost-gluon kernel

2019

The ghost-gluon scattering kernel is a special correlation function that is intimately connected with two fundamental vertices of the gauge sector of QCD: the ghost-gluon vertex, which may be obtained from it through suitable contraction, and the three-gluon vertex, whose Slavnov-Taylor identity contains that kernel as one of its main ingredients. In this work we present a detailed nonperturbative study of the five form factors comprising it, using as starting point the `one-loop dressed' approximation of the dynamical equations governing their evolution. The analysis is carried out for arbitrary Euclidean momenta, and makes extensive use of the gluon propagator and the ghost dressing funct…

High Energy Physics - TheoryQuantum chromodynamicsPhysicsHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyFOS: Physical sciencesPropagatorGluonVertex (geometry)High Energy Physics - PhenomenologyTheoretical physicsHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - LatticeHigh Energy Physics - Theory (hep-th)Lattice (order)Euclidean geometryEquations for a falling bodyTwo-formPhysical Review
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Lattice-constrained parametrizations of form factors for semileptonic and rare radiative B decays

1997

We describe the form factors for B to rho lepton neutrino and B to K* gamma decays with just two parameters and the two form factors for B to pi lepton neutrino with a further two or three parameters. The parametrizations are consistent with heavy quark symmetry, kinematic constraints and lattice results, which we use to determine the parameters. In addition, we test versions of the parametrizations consistent (or not) with light-cone sum rule scaling relations at q^2=0.

QuarkPhysicsNuclear and High Energy PhysicsParticle physicsHigh Energy Physics - Lattice (hep-lat)High Energy Physics::Phenomenologyhep-latLattice QCD calculationFOS: Physical sciencesFísicaAtomic and Molecular Physics and OpticsSemileptonic and rare radiative decays of B mesonsHigh Energy Physics - LatticeDetermination of Cabibbo-Kobayashi-Maskawa matrix elementsLattice (order)Radiative transferHigh Energy Physics::ExperimentSum rule in quantum mechanicsNeutrinoScalingHeavy quark effective theoryTwo-formLepton
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