And Other Charmed Baryons Revisited (original) (raw)

Ωc and Other Charmed Baryons Revisited

1995

The mass of the 0 c baryon with quark content (ssc) is computed in a potential model whose parameters have been determined in 1981 by tting the spectrum of heavy mesons. It is found in perfect agreement with a recent measurement at the CERN hyperon-beam experiment. The spectroscopy of other charmed baryons in potential models is briey reviewed.

Heavy Baryons in a Quark Model

International Journal of Modern Physics A, 2008

A quark model is applied to the spectrum of baryons containing heavy quarks. The model gives masses for the known heavy baryons that are in agreement with experiment, but for the doubly-charmed baryon Ξcc, the model prediction is too heavy. Mixing between the ΞQ and Ξ′Q states is examined and is found to be small for the lowest lying states. In contrast with this, mixing between the Ξbc and Ξ′bc states is found to be large, and the implication of this mixing for properties of these states is briefly discussed. We also examine heavy-quark spin-symmetry multiplets, and find that many states in the model can be placed in such multiplets. We compare our predictions with those of a number of other authors.

Light and heavy baryon masses: the 1/N_c expansion and the quark model

arXiv: High Energy Physics - Phenomenology, 2008

We establish a connection between the quark model and the 1/N_c expansion mass formulas used in the description of baryon resonances. We show that a remarkable compatibility exists between the two methods in the light and heavy baryon sectors. In particular, the band number used to classify baryons in the 1/N_c expansion is explained by the quark model and the mass formulas for both approaches are consistent.

Spectrum of strange singly charmed baryons in the constituent quark model

The European Physical Journal Plus

Excited states masses of the strange singly charmed baryons are calculated using the non-relativistic approach of hypercentral Constituent Quark Model (hCQM). The hyper-Coulomb plus screened potential is used as a confinement potential with the first order correction. The spin-spin, spinorbit and spin-tensor interaction terms are included perturbatively. Our calculated masses are allowed to construct the Regge trajectories in both (n r , M 2) and (J, M 2) planes. The mass spectra and the Regge trajectories study predict the spin-parity of Ξ c (2970) +/0 , Ξ c (3080) +/0 , Ξ c (3123) + , Ω c (3000) 0 and Ω c (3119) 0 baryons. Moreover, the strong one pion decay rates of the isodoublet states of Ξ c (2645), Ξ c (2790) and Ξ c (2815) are analyzed in the framework of Heavy Hadron Chiral Perturbation Theory (HHChPT). Also, the ground state magnetic moments and the radiative decay rates based on the transition magnetic moments are calculated in the framework of constituent quark model.

Towards an understanding of heavy baryon spectroscopy

The European Physical Journal A, 2008

The recent observation at CDF and D0 of Σ b , Σ * b and Ξ b baryons opens the door to the advent of new states in the bottom baryon sector. The states measured provide sufficient constraints to fix the parameters of phenomenological models. One may therefore consistently predict the full bottom baryon spectra. For this purpose we have solved exactly the three-quark problem by means of the Faddeev method in momentum space. We consider our guidance may help experimentalists in the search for new bottom baryons and their findings will help in constraining further the phenomenological models. We identify particular states whose masses may allow to discriminate between the dynamics for the light-quark pairs predicted by different phenomenological models. Within the same framework we also present results for charmed, doubly charmed, and doubly bottom baryons. Our results provide a restricted possible assignment of quantum numbers to recently reported charmed baryon states. Some of them are perfectly described by D−wave excitations with J P = 5/2 + , as the Λ c (2880), Ξ c (3055), and Ξ c (3123).

Heavy baryons in the relativistic quark model

Progress in Particle and Nuclear Physics, 2003

In the framework of the relativistic quasipotential quark model the mass spectrum of baryons with two heavy quarks is calculated. The quasipotentials for interactions of two quarks and of a quark with a scalar and axial vector diquark are evaluated. The bound state masses of baryons with J P = 1 2 + , 3 2 + are computed.

Baryon Spectroscopy and Heavy Quarks

International Journal of Modern Physics: Conference Series, 2011

Two topics are briefly reviewed in this talk: the decay of flavored hadrons or quarkonium states involving a baryon–antibaryon pair, and the spectroscopy of heavy baryons containing one, two or three heavy quarks. Some prospects for exotic heavy baryons are also discussed.