0000000000279510

AUTHOR

Albert Feijoo

showing 3 related works from this author

Lambda(b) -> J/psi K Xi decay and the higher order chiral terms of the meson baryon interaction

2015

We study the weak decay of the Lambda(b) into J/psi K Xi. and J/psi eta Lambda states, and relate these processes to the Lambda(b) -> J/psi(K) over barN decay mode. The elementary weak transition at the quark level proceeds via the creation of a J/psi meson and an excited sud system with I = 0, which upon hadronization leads to (K) over barN or eta Lambda pairs. These states undergo final-state interaction in coupled channels and produce a final meson-baryon pair. The K. state only occurs via rescattering, hence making the Lambda(b) -> J/psi K Xi process very sensitive to the details of the meson-baryon interaction in strangeness S = -1 and isospin I = 0. We show that the corresponding inva…

Nuclear TheoryFísicaHigh Energy Physics::ExperimentNuclear Experiment
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Predictions for pentaquark states of hidden charm molecular nature and comparison with experiment

2016

Predictions for hidden charm molecules, with and without strangeness, were made prior to the LHCb experiment. We discuss these issues and how these states can be observed in the reactions, Λ b → J / ψK − p , Λ b → J / ψη Λ, Λ b → J / ψπ − p , Λ b → J / ψK 0 Λ and Ξ − b → J / ψK − Λ by looking at the invariant mass distributions for J / ψp or J / ψ Λ.

PhysicsParticle physics010308 nuclear & particles physicsPhysicsQC1-9990103 physical sciencesInvariant massCharm (quantum number)StrangenessAtomic physics010306 general physics01 natural sciencesPentaquarkEPJ Web of Conferences
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Study of reactions disclosing hidden charm pentaquarks with or without strangeness

2016

We present results for five reactions, Lambda(b) -> J/psi K(-)p, Lambda(b) -> J/psi eta Lambda, Lambda(b) -> J/psi pi(-)p, Lambda(b) -> J/psi K-0 Lambda and Xi(-)(b) -> J/psi K-Lambda, where combining information from the meson baryon interaction, using the chiral unitary approach, and predictions made for molecular states of hidden charm, with or without strangeness, we can evaluate invariant mass distributions for the light meson baryon states, and for those of J/psi p or J/psi Lambda. We show that with the present available information, in all of these reactions one finds peaks where the pentaquark states show up. In the Lambda(b) -> J/psi K(-)p, and Lambda(b) -> J/psi pi(-)p reactions w…

PhysicsNuclear and High Energy PhysicsParticle physicsMesonUnitarity010308 nuclear & particles physicsStrangenessLambda01 natural sciencesPseudoscalar mesonPentaquarkNuclear physicsBaryonIsospin0103 physical sciencesHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsNuclear Physics A
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