Search results for "Light mesons"

showing 2 items of 2 documents

Distribution Amplitudes of Heavy-Light Mesons

2019

A symmetry-preserving approach to the continuum bound-state problem in quantum field theory is used to calculate the masses, leptonic decay constants and light-front distribution amplitudes of empirically accessible heavy-light mesons. The inverse moment of the $B$-meson distribution is particularly important in treatments of exclusive $B$-decays using effective field theory and the factorisation formalism; and its value is therefore computed: $\lambda_B(\zeta = 2\,{\rm GeV}) = 0.54(3)\,$GeV. As an example and in anticipation of precision measurements at new-generation $B$-factories, the branching fraction for the rare $B\to \gamma(E_\gamma) \ell \nu_\ell$ radiative decay is also calculated…

Nuclear and High Energy PhysicsParticle physicsMesonNuclear TheoryAstrophysics::High Energy Astrophysical PhenomenaInverseFOS: Physical sciencesHeavy-light mesons01 natural sciencesParton distribution amplitudesNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)High Energy Physics - Lattice0103 physical sciencesBound stateNonperturbative continuum methods in quantum field theoryEffective field theoryQuantum field theory010306 general physicsNuclear ExperimentQuantum chromodynamicsPhysics010308 nuclear & particles physicsBranching fractionHigh Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyB-meson decayslcsh:QC1-999High Energy Physics - PhenomenologyAmplitudeHigh Energy Physics::Experimentlcsh:PhysicsQuantum chromodynamics
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Light meson physics from maximally twisted mass lattice QCD

2009

40 pages, 5 figures, 8 tables, 3 appendix.-- PACS: 11.15.Ha; 12.38.Gc; 12.39.Fe

QuarkNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryMesonHigh Energy Physics::LatticeFOS: Physical sciencesLattice QCD7. Clean energy01 natural sciencessymbols.namesakeHigh Energy Physics - LatticeLattice constantChiral perturbation theoryLattice (order)0103 physical sciences010306 general physicsPhysics[PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat]010308 nuclear & particles physicsHigh Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyLight mesonsMeson physicsFísicaFermionLattice QCDTwisted mass quarksQCDStrong interactions3. Good healthSettore FIS/02 - Fisica Teorica Modelli e Metodi MatematiciLattice QCD; Strong interactions; Meson physics; Twisted mass quarkssymbolsLow energy constantsLagrangian
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