Embryonic Pattern in Drosophila: The Spatial Distribution and Sequence-specific DNA Binding of engrailed Protein (original) (raw)

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.

And Other Charmed Baryons Revisited

Physics Letters B, 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.

Studies of charmed strange baryons in theΛDfinal state at Belle

Physical Review D, 2016

We report the discovery of Ξc(3055) 0 , observed by its decay into the final state ΛD 0 , and present the first observation and evidence of the decays of Ξc(3055) + and Ξc(3080) + into ΛD +. We also perform a combined analysis of the ΛD + with the Σ ++ c K − and Σ * ++ c K − decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Ξc(3055) + → ΛD +)/B(Ξc(3055) + → Σ ++ c K −) = 5.09 ± 1.01 ± 0.76, B(Ξc(3080) + → ΛD +)/B(Ξc(3080) + → Σ ++ c K −) = 1.29 ± 0.30 ± 0.15, and B(Ξc(3080) + → Σ * ++ c K −)/B(Ξc(3080) + → Σ ++ c K −) = 1.07 ± 0.27 ± 0.01, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb −1 data sample collected with the Belle detector at the KEKB asymmetric-energy e + e − collider.

Charm, bottom, strange baryon masses using QCD sum rules

International Journal of Modern Physics A

We use the method of QCD sum rules to estimate the masses of the charm baryon, [Formula: see text], bottom baryon [Formula: see text], strange baryon [Formula: see text] and compare them to their experimental values.

Spectroscopy of doubly charmed baryons

AIP Conference Proceedings, 2006

We study the mass spectrum of baryons with two and three charmed quarks. For double charm baryons the spin splitting is found to be smaller than standard quark-model potential predictions. This splitting is not influenced either by the particular form of the confining potential or by the regularization taken for the contact term of the spin-spin potential. We consistently predict the spectra for triply charmed baryons.

Charmed and bottom baryons: A variational approach based on heavy quark symmetry

2004

The use of Heavy Quark Symmetry to study bottom and charmed baryons leads to important simplifications of the non-relativistic three body problem, which turns out to be easily solved by a simple variational ansatz. Our simple scheme reproduces previous results (baryon masses, charge and mass radii, • • •) obtained by solving the Faddeev equations with simple non-relativistic quark-quark potentials, adjusted to the light and heavy-light meson spectra. Wave functions, parameterized in a simple manner, are also given and thus they can be easily used to compute further observables. Our method has been also used to find the predictions for strangeness-less baryons of the SU(2) chirally inspired quark-quark interactions. We find that the one pion exchange term of the chirally inspired interactions leads to relative changes of the Λ b and Λc binding energies as large as 90%.

Spectrum of Nonstrange Singly Charmed Baryons in the Constituent Quark Model

International Journal of Theoretical Physics

We study the masses of radial and orbital excited states of nonstrange singly charmed baryons in the framework of hypercentral Constituent Quark Model (hCQM). To obtain the mass spectra, the Coulomb plus screened potential is employed with the first order correction, which gives a relativistic effect of order O(1/m). The spin-spin, spin-orbit and tensor interactions are included (perturbatively as a spin dependent potential) in order to generate the splitting in mass spectra. We compare our computed mass spectra of nonstrange singly charmed baryons with the other theoretical predictions as well as with the experimental observations. We construct the Regge trajectories of these baryons in the (J, M 2) plane. Further, we analyze the strong one pion decay rates for S, P and the D-wave transitions in the framework of Heavy Hadron Chiral Perturbation Theory (HHChPT). Moreover, the electromagnetic properties like magnetic moments, transition magnetic moments and the radiative decay widths are determined for the ground state of these baryons in the constituent quark model.

Properties of Doubly Charmed Baryons In the Quark-Diquark Model

Arxiv preprint arXiv: …, 2008

Baryons containing two heavy quarks are important and interesting systems to study the quark-diquark structure of baryons and to understand the dynam-ics of QCD at hadronic scale. The Selex Collaboration has recently reported the discovery of Ξcc with a mass of ...