0000000000041396

AUTHOR

Eduardo De Rafael

showing 5 related works from this author

Muon Anomaly from Lepton Vacuum Polarization and The Mellin--Barnes Representation

2008

We evaluate, analytically, a specific class of eighth--order and tenth--order QED contributions to the anomalous magnetic moment of the muon. They are generated by Feynman diagrams involving lowest order vacuum polarization insertions of leptons $l=e,\mu$, and $\tau$. The results are given in the form of analytic expansions in terms of the mass ratios $m_e/m_\mu$ and $m_\mu/m_\tau$. We compute as many terms as required by the error induced by the present experimental uncertainty on the lepton masses. We show how the Mellin--Barnes integral representation of Feynman parametric integrals allows for an easy analytic evaluation of as many terms as wanted in these expansions and how its underlyi…

Nuclear and High Energy PhysicsParticle physicsFOS: Physical sciences01 natural sciencesRenormalizationsymbols.namesakeHigh Energy Physics - Phenomenology (hep-ph)Vacuum PolarizationMuon Anomaly0103 physical sciencesFeynman diagramVacuum polarization010306 general physicsMathematical physicsPhysicsMuonMellin-Barnes RepresentationAnomalous magnetic dipole moment010308 nuclear & particles physicsConverse MappingRenormalization groupHigh Energy Physics - PhenomenologyMultidimensional Residues[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]symbolsAnomaly (physics)Lepton
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Radiative Kaon decays and CP violation in chiral perturbation theory

1988

38 páginas, 11 figuras, 2 tablas.-- CERN-TH-4853-87 ; UWTHPH-1987-31.

Coupling constantPhysicsNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryFísicaObservableSpectral lineAmplitudeQuantum electrodynamicsBibliographyRadiative transferCP violationParticle Physics - PhenomenologyNuclear Physics B
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Four-quark operators and non-leptonic weak transitions

1991

72 páginas, 12 figuras, 6 tablas.-- CERN-TH-5906-90 ; CPT-2393.

Quantum chromodynamicsPhysicsQuarkCoupling constantNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::LatticeSpontaneous symmetry breakingHigh Energy Physics::PhenomenologyFísicaPerturbative QCDQuantum field theoryChiral symmetry breakingEffective actionParticle Physics - Theory
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Strong CP-violation in an effective chiral lagrangian approach

1991

21 páginas, 2 figuras.-- CERN-TH-6071-91

Quantum chromodynamicsPhysicsChiral anomalyNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryFísicaElectric dipole momentGoldstone bosonCP violationVacuum polarizationPhenomenology (particle physics)Particle Physics - Theory
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K 0 --> pi 0 gammagamma decays in chiral perturbation theory

1987

The decays K L,S --> pi 0gammagamma are calculated within the framework of chiral perturbation theory. The amplitude for K L --> pi 0gammagamma is found to be finite at the one-loop level yielding a branching ratio of 6.8 × 10 -7. The decay spectra of both decays are very characteristic and provide good tests of the effective chiral symmetry realization of the standard model.

FísicaHigh Energy Physics::Experiment
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