0000000000336416

AUTHOR

P. Kroll

showing 4 related works from this author

Heavy Baryon Transitions in a Relativistic Three-Quark Model

1996

Exclusive semileptonic decays of bottom and charm baryons are considered within a relativistic three-quark model with a Gaussian shape for the baryon-three-quark vertex and standard quark propagators. We calculate the baryonic Isgur-Wise functions, decay rates and asymmetry parameters.

QuarkSemileptonic decayPhysicsNuclear and High Energy PhysicsParticle physicsmedia_common.quotation_subjectHigh Energy Physics::LatticeQuark modelNuclear TheoryHigh Energy Physics::PhenomenologyForm factor (quantum field theory)FOS: Physical sciencesAsymmetryBaryonCharmed baryonsNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentCharm (quantum number)Nuclear Experimentmedia_common
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Infinite momentum frame calculation of semileptonic heavyΛb→Λctransitions including HQET improvements

1997

We calculate the transition form factors that occur in heavy {Lambda}-type baryon semileptonic decays such as, e.g., in {Lambda}{sub b}{r_arrow}{Lambda}{sub c}{sup +}+l{sup {minus}}+{bar {nu}}{sub l}. We use Bauer-Stech-Wirbel-type infinite momentum frame wave functions for the heavy {Lambda}-type baryons which we assume to consist of a heavy quark and a light spin-isospin zero diquark system. The form factors at q{sup 2}=0 are calculated from the overlap integrals of the initial and final {Lambda}-type baryon states. To leading order in the heavy mass scale the structure of the form factors agrees with the HQET predictions including the normalization at zero recoil. The leading order {omeg…

BaryonPhysicsOrientation (vector space)Semileptonic decayNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::PhenomenologyQuark modelForm factor (quantum field theory)Order (ring theory)Lambda baryonLambdaPhysical Review D
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Heavy quark symmetry at large recoil: the case of baryons

1993

We analyze the large recoil behaviour of heavy baryon transition form factors in semileptonic decays. We use a generalized Brodsky-Lepage hard scattering formalism where diquarks are considered as quasi-elementary constituents of baryons. In the limit of infinitely heavy quark masses the large recoil form factors exhibit a new model-independent heavy quark symmetry which is reminiscent but not identical to the Isgur-Wise symmetry at low recoil.

QuarkPhysicsParticle physicsPhysics and Astronomy (miscellaneous)ScatteringHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyElementary particleBottom quarkNuclear physicsBaryonFormalism (philosophy of mathematics)RecoilHigh Energy Physics::ExperimentQuantum field theoryNuclear ExperimentEngineering (miscellaneous)Zeitschrift f�r Physik C Particles and Fields
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Heavy quark symmetry at large recoil

1992

Abstract We analyze the large recoil behaviour of heavy meson transition form factors using the Brodsky-Lepage hard scattering formalism. At the leading order of the heavy mass scale the large recoil form factors exhibit a new type of heavy quark symmetry. We discuss next-to-leading mass effects and present explicit 1/MQ expressions for the form factors in the peaking approximation.

PhysicsQuantum chromodynamicsQuarkNuclear and High Energy PhysicsParticle physicsMesonScatteringHigh Energy Physics::PhenomenologyElementary particleNuclear physicsRecoilMass scaleQuantum field theoryNuclear ExperimentPhysics Letters B
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