HEAVY PENTAQUARKS AND DOUBLY HEAVY BARYONS IN QUASIPARTICLE APPROACH

2012 ◽  
Vol 27 (01) ◽  
pp. 1250006 ◽  
Author(s):  
A. CHANDRA ◽  
A. BHATTACHARYA ◽  
B. CHAKRABARTI
Keyword(s):  
Heavy Quark ◽  
Flux Tube ◽  
Regge Trajectory ◽  
Ground State ◽  
Tube Model ◽  
Regge Trajectories ◽  
Heavy Baryons ◽  
Good Agreement

In the framework of the quasiparticle approach, the ground state mass of heavy pentaquarks have been investigated in diquark–diquark–antiquark picture and the higher states are investigated in the mass loaded flux tube model where two light diquarks are supposed to be linked by a flux tube to the heavy quark. The Regge trajectories for heavy pentaquarks have been studied. The Regge slope (α) of these particles have been obtained as ≈1 GeV2 which indicates that the Regge trajectory follows the linearity conditions with universal value of α (~ 1 GeV2). The ground state mass of doubly charm and doubly bottom baryons like [Formula: see text] have also been investigated in quasiparticle approach. The results are found to be in reasonably good agreement with the experimental and other theoretical estimates.

scholarly journals Regge trajectories of exotic hadrons in the flux tube model

2016 ◽  
Vol 31 (04n05) ◽  
pp. 1650007 ◽  
Author(s):  
Hemwati Nandan ◽  
Akhilesh Ranjan
Keyword(s):  
Flux Tube ◽  
Tube Model ◽  
Lattice Data ◽  
High Rotational Speed ◽  
Quark Masses ◽  
Regge Trajectories ◽  
Linear Behavior ◽  
Exotic Hadrons ◽  
Tube Structure ◽  
Current Quark

We have investigated the Regge trajectories of exotic hadrons by considering different possible pentaquark configurations with finite quark mass in the flux tube model. Significant deviation is observed in the linear behavior of the Regge trajectories for pentaquark systems in view of the universal value of the Regge slope parameter for hadrons. The modified Regge trajectories are also compared with the available experimental and lattice data. It is observed that the nonlinear Regge trajectories of such pentaquark systems can be well described by the relativistic corrections in view of the current quark masses and the high rotational speed of the quarks at the end of flux tube structure.

scholarly journals Spectrum of fully-heavy tetraquarks from a diquark+antidiquark perspective

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
M. A. Bedolla ◽  
J. Ferretti ◽  
C. D. Roberts ◽  
E. Santopinto
Keyword(s):  
Experimental Data ◽  
Heavy Quark ◽  
Ground State ◽  
Diquark Model ◽  
Heavy Baryons ◽  
Model Hamiltonian ◽  
Quark Flavour ◽  
The Masses ◽  
Model Approach

AbstractUsing a relativized diquark model Hamiltonian, we calculate the masses of $$J^{PC}=0^{++}$$ J PC = 0 + + ground-state tetraquarks in the following systems: $$b s {\bar{b}} {\bar{s}}$$ b s b ¯ s ¯ , $$bb {\bar{n}} {\bar{n}}$$ b b n ¯ n ¯ ($$n=u, d$$ n = u , d ), $$bb {\bar{s}} {\bar{s}}$$ b b s ¯ s ¯ , $$cc{\bar{c}} {\bar{c}}$$ c c c ¯ c ¯ , $$b b {\bar{b}} {\bar{b}}$$ b b b ¯ b ¯ , $$b c{\bar{b}} {\bar{c}}$$ b c b ¯ c ¯ and $$b b {\bar{c}} {\bar{c}}$$ b b c ¯ c ¯ . We also compute extensive spectra for the fully-heavy quark flavour combinations. Finally, as a test of the diquark model approach, we compute the masses of fully-heavy baryons in the diquark model. Our results may be compared soon to the forthcoming experimental data for fully-heavy three-quark systems.

scholarly journals Ground-state masses and magnetic moments of heavy baryons

2014 ◽  
Vol 29 (20) ◽  
pp. 1450106 ◽  
Author(s):  
Zahra Ghalenovi ◽  
Ali Akbar Rajabi ◽  
Si-xue Qin ◽  
Dirk H. Rischke
Keyword(s):  
Experimental Data ◽  
Hyperfine Interaction ◽  
Quark Model ◽  
Ground State ◽  
Magnetic Moments ◽  
Heavy Flavor ◽  
Relativistic Quark Model ◽  
Heavy Baryons ◽  
Hypercentral Approach ◽  
Good Agreement

In this work, we study single, double and triple heavy-flavor baryons using the hypercentral approach in the framework of the non-relativistic quark model. Considering two different confining potentials and an improved form of the hyperfine interaction, we calculate the ground-state masses of heavy baryons and also the ground-state magnetic moments of single charm and beauty baryons with JP = 3/2+. The obtained results are in good agreement with experimental data and those of other works.

scholarly journals Effective String Description of the Confining Flux Tube at Finite Temperature

Universe ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 170
Author(s):  
Michele Caselle
Keyword(s):  
Flux Tube ◽  
Dimensional Reduction ◽  
Conformal Invariance ◽  
Finite Temperature ◽  
Gauge Theories ◽  
Linear Increase ◽  
General Introduction ◽  
Interquark Potential ◽  
Effective String Theory ◽  
Good Agreement

In this review, after a general introduction to the effective string theory (EST) description of confinement in pure gauge theories, we discuss the behaviour of EST as the temperature is increased. We show that, as the deconfinement point is approached from below, several universal features of confining gauge theories, like the ratio Tc/σ0, the linear increase of the squared width of the flux tube with the interquark distance, or the temperature dependence of the interquark potential, can be accurately predicted by the effective string. Moreover, in the vicinity of the deconfinement point the EST behaviour turns out to be in good agreement with what was predicted by conformal invariance or by dimensional reduction, thus further supporting the validity of an EST approach to confinement.

VMC CALCULATIONS OF THE GROUND STATE PROPERTIES OF NUCLEAR MATTER

2005 ◽  
Vol 14 (02) ◽  
pp. 255-267 ◽  
Author(s):  
KAAN MANİSA ◽  
ÜLFET ATAV ◽  
RIZA OGUL
Keyword(s):  
Nuclear Matter ◽  
Ground State ◽  
Nucleon Nucleon ◽  
Neutron Matter ◽  
Potential Term ◽  
Ground State Properties ◽  
Dependent Potential ◽  
Variational Monte Carlo Method ◽  
Kinetic And Potential Energies ◽  
Good Agreement

A Variational Monte Carlo method (VMC) is described for the evaluation of the ground state properties of nuclear matter. Equilibrium properties of symmetric nuclear matter and neutron matter are calculated by the described VMC method. The Urbana ν14 potential is used for the nucleon–nucleon interactions in the calculations. Three- and more-body interactions are included as a density dependent potential term. Total, kinetic and potential energies per particle are obtained for nuclear and neutron matter. Pressure values of nuclear and neutron matter are also calculated at various densities. The binding energy of nuclear matter is found to be -16.06 MeV at a saturation density of 0.16 fm -3. The results obtained are in good agreement with those obtained by various authors with different potentials and techniques.

scholarly journals THE METHOD OF INCREMENTS — A WAVEFUNCTION-BASED AB-INITIO CORRELATION METHOD FOR SOLIDS

2007 ◽  
Vol 21 (13n14) ◽  
pp. 2204-2214 ◽  
Author(s):  
BEATE PAULUS
Keyword(s):  
Experimental Data ◽  
Ab Initio ◽  
Ground State ◽  
Infinite System ◽  
Correlation Energy ◽  
Correlation Method ◽  
Many Body ◽  
Hartree Fock ◽  
The Many ◽  
Good Agreement

The method of increments is a wavefunction-based ab initio correlation method for solids, which explicitly calculates the many-body wavefunction of the system. After a Hartree-Fock treatment of the infinite system the correlation energy of the solid is expanded in terms of localised orbitals or of a group of localised orbitals. The method of increments has been applied to a great variety of materials with a band gap, but in this paper the extension to metals is described. The application to solid mercury is presented, where we achieve very good agreement of the calculated ground-state properties with the experimental data.

scholarly journals Non-Relativistic Model for the Semileptonic Λb→Λc Decay

1997 ◽  
Vol 12 (03) ◽  
pp. 195-204 ◽  
Author(s):  
Debrupa Chakraverty ◽  
Triptesh De ◽  
Binayak Dutta-Roy ◽  
K. S. Gupta
Keyword(s):  
Heavy Quark ◽  
Decay Width ◽  
Branching Ratio ◽  
Relativistic Model ◽  
Heavy Quark Symmetry ◽  
Heavy Baryons

We calculate the decay width for [Formula: see text] in the framework of a non-relativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value.

On changes of the rotation velocities of stable, recurrent sunspots and their interpretation with a flux tube model

Solar Physics ◽  
1982 ◽  
Vol 76 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Horst Balthasar ◽  
Manfred Sch�ssler ◽  
Hubertus W�hl
Keyword(s):  
Flux Tube ◽  
Tube Model
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