scholarly journals Doubly charmed multibaryon systems

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
H. Garcilazo ◽  
A. Valcarce
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Heavy Quarks ◽  
Separation Energy ◽  
Quantum Numbers ◽  
Body State

Abstract We study two- and three-baryon systems with two units of charm looking for possible bound states or resonances. All two-baryon interactions are consistently derived from a constituent quark model tuned in the light-flavor hadron phenomenology: spectra and interactions. The presence of the heavy quarks makes the two-body interactions simpler than in the light-flavor sector. Our results show a narrow two-body resonance with quantum numbers $$(I,J^P)=(0,0^+)$$(I,JP)=(0,0+). It is located 6.2 MeV below the $$\Sigma _c\Sigma _c$$ΣcΣc threshold and has a width of 4.7 MeV. The foregoing two-body state contributes to generate a $$N \Sigma _c\Sigma _c$$NΣcΣc resonance with quantum numbers $$(I,J^P)=(1/2,1/2^+)$$(I,JP)=(1/2,1/2+) and a separation energy of 0.2 MeV.

scholarly journals STRUCTURE OF LIGHT AND HEAVY PENTAQUARKS

2005 ◽  
Vol 20 (08n09) ◽  
pp. 1797-1802 ◽  
Author(s):  
FL. STANCU
Keyword(s):  
Variational Method ◽  
Hyperfine Interaction ◽  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Positive Parity ◽  
Model Based ◽  
Quantum Numbers ◽  
The Masses

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light antidecuplet members are calculated dynamically using a variational method. It is shown that the octet and antidecuplet states with the same quantum numbers mix ideally due to SU (3)F breaking. Masses of the charmed antisextet pentaquarks are predicted within the same model.

scholarly journals The charged $Z_c$ and $Z_b$ structures in a constituent quark model approach

2020 ◽  
Author(s):  
Pablo G. Ortega ◽  
Jorge Segovia ◽  
David Rodriguez Entem ◽  
Francisco Fernández
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Heavy Quarks ◽  
Coupled Channels ◽  
Wide Range ◽  
Quark Content ◽  
Model Approach

The nature of the recently discovered Z_cZc and Z_bZb structures is intriguing. Their charge forces its minimal quark content to be Q\bar Q q\bar qQQ‾qq‾ (where Q=\{c,b\}Q={c,b} and q=\{u,d\}q={u,d}). In this work we perform a molecular coupled-channels calculation of the I^G(J^{PC})=1^+(1^{+-})IG(JPC)=1+(1+−) charm and bottom sectors in the framework of a constituent quark model which satisfactorily describes a wide range of properties of (non-)conventional hadrons containing heavy quarks. All the relevant channels are included for each sector, i.e.: The D^{(\ast)}\bar D^{\ast}+h.c.D(*)D‾*+h.c., \pi J/\psiπJ/ψ and \rho\eta_cρηc channels for the Z_cZc and B^{(\ast)}B^{\ast}B(*)B* and \Upsilon(nS)\piΥ(nS)π (n=1,2,3n=1,2,3) channels for the Z_bZb analysis. Possible structures of these resonances will be discussed.

scholarly journals New Predictions for Charmed and Bottom Baryons

1997 ◽  
Vol 12 (22) ◽  
pp. 4079-4086 ◽  
Author(s):  
Adam F. Falk
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Heavy Baryon ◽  
Constituent Quark Model ◽  
Recent Proposal ◽  
Quantum Numbers ◽  
Poor Predictor ◽  
Heavy Baryons ◽  
Baryon Spectroscopy ◽  
Bottom Baryon

I review the recent proposal that there are new isotriplet heavy baryons with masses approximately 2380 MeV and 5760 MeV. This prediction follows from the application of heavy spin-flavor and light SU(3) symmetries to the observed charmed and bottom baryon states. It also entails assumptions about the spin and parity quantum numbers of the observed states which are different than is commonly supposed. The discovery of such states would imply that the nonrelativistic constituent quark model is a poor predictor of heavy baryon spectroscopy. I update the analysis in light of new data which have become available.

scholarly journals Masses of Charmed and Bottom Tetraquarks in the Non-Relativistic Quark Model

2018 ◽  
Vol 46 ◽  
pp. 1860084 ◽  
Author(s):  
Zahra Ghalenovi
Keyword(s):  
Wave Function ◽  
Quark Model ◽  
Bound States ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Relativistic Quark Model ◽  
Scalar State ◽  
State Formula ◽  
The Masses ◽  
Scalar Resonances

Heavy tetraquark states are studied within the diquark-antidiquark picture in the framework of a simple constituent quark model. Considering hyperfine spin and isospin interactions, we predict the masses of the scalar diquarks and of the open and hidden charmed and bottom scalar tetraquarks. Our results indicate the scalar resonances [Formula: see text] and [Formula: see text] have a sizable tetraquark amount in their wave function, while it turns out the scalar state [Formula: see text] should not be considered as being predominately diquark-antidiquark bound states.

Mass spectrum of triply heavy baryon in the hypercentral quark model

2021 ◽  
Vol 36 (39) ◽  
Author(s):  
N. Tazimi ◽  
A. Ghasempour
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Heavy Baryon ◽  
Constituent Quark Model ◽  
Quantum Numbers ◽  
Heavy Baryons ◽  
Klein Gordon ◽  
Three Body ◽  
Uvarov Method ◽  
Dependent Interaction

In this study, we consider baryons as three-body bound systems according to hypercentral constituent quark model in configuration space and solve three-body Klein–Gordon equation. Then we analyze perturbative spin-dependent and isospin-dependent interaction effects. To find the analytical solution, we used screened potential and calculate the eigenfunctions and eigenvalues of triply heavy baryons by using Nikiforov–Uvarov method. We compute the ground and excited state masses of triply heavy baryons with quantum numbers [Formula: see text], [Formula: see text], [Formula: see text] via constituent quark model approach.

scholarly journals Bound states in a constituent quark model

1996 ◽  
Vol 22 (8) ◽  
pp. 1151-1159 ◽  
Author(s):  
M W Beinker ◽  
B C Metsch ◽  
H R Petry
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Constituent Quark ◽  
Constituent Quark Model

scholarly journals The Genuine Resonance of Full-Charm Tetraquarks

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 155
Author(s):  
Xiaoyun Chen
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Expansion Method ◽  
Chiral Quark Model ◽  
Stabilization Method ◽  
Scaling Method ◽  
Resonance States ◽  
Gaussian Expansion Method ◽  
Color Structure ◽  
Quantum Numbers

In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method. In this calculation, two structures, meson-meson and diquark–antidiquark, as well as their mixing with all possible color-spin configurations, are considered. The results show that no bound states can be formed. However, resonances are possible because of the color structure. The genuine resonances are identified by the stabilization method (real scaling method). Several resonances for the full-charm system are proposed, and some of them are reasonable candidates for the full-charm states recently reported by LHCb.

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