0000000000685597

AUTHOR

Ulrich Kilian

showing 2 related works from this author

New representation of two-loop propagator and vertex functions

1994

We present a new method of calculating scalar propagator and vertex functions in the two-loop approximation, for arbitrary masses of particles. It is based on a double integral representation, suitable for numerical evaluation. Real and imaginary parts of the diagrams are calculated separately, so that there is no need to use complex arithmetics in the numerical program.

PhysicsNuclear and High Energy PhysicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Multiple integralQuantum mechanicsScalar (mathematics)Mathematical analysisFOS: Physical sciencesPropagator
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Excited charmed mesons in chiral perturbation theory

1992

Abstract Heavy meson, p- to s-wave, one-pion transitions are studied in the context of the union of heavy quark and chiral symmetries. The interactions are described by an effective lagrangian density invariant under the combined heavy quark and chiral symmetries. We study the pattern of the heavy quark symmetry breaking by considering 1 m Q corrections to the infinite mass limit.

Chiral anomalyPhysicsQuarkNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryMesonHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyBottom quarklcsh:QC1-999High Energy Physics::ExperimentSymmetry breakingQuantum field theoryNuclear ExperimentChiral symmetry breakinglcsh:PhysicsPhysics Letters B
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