0000000000379251

AUTHOR

F. Berto

showing 2 related works from this author

Extended HQEFT Lagrangian and currents

2000

From the tree-level heavy quark effective Lagrangian keeping particle-antiparticle mixed sectors we derive the vector current coupling to a hard gluonic field allowing for heavy quark-antiquark pair annihilation and creation.

QuarkPhysicsCouplingNuclear and High Energy PhysicsParticle physicsCurrent (mathematics)AnnihilationField (physics)High Energy Physics::LatticeHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaAtomic and Molecular Physics and OpticsHigh Energy Physics - Phenomenologysymbols.namesakeHigh Energy Physics - Phenomenology (hep-ph)Effective lagrangiansymbolsHigh Energy Physics::ExperimentLagrangian
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A heavy-quark effective field Lagrangian keeping particle and antiparticle mixed sectors

1998

We derive a tree-level heavy quark effective Lagrangian keeping particle-antiparticle mixed sectors allowing for heavy quark-antiquark pair annihilation and creation. However, when removing the unwanted degrees of freedom from the effective Lagrangian one has to be careful in using the classical equations of motion obeyed by the effective fields in order to get a convergent expansion on the reciprocal of the heavy quark mass. Then the application of the effective theory to such hard processes should be sensible for special kinematic regimes as for example heavy quark pair production near threshold.

PhysicsQuarkAntiparticleParticle physicsAnnihilationField (physics)High Energy Physics::LatticeHigh Energy Physics::PhenomenologyDegrees of freedom (physics and chemistry)FOS: Physical sciencesFísicaEquations of motionHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Pair productionEffective field theoryHigh Energy Physics::ExperimentIl Nuovo Cimento A
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