quark model
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2022 ◽  
Vol 258 ◽  
pp. 03004
Author(s):  
Chandni Menapara ◽  
Ajay Kumar Rai

Hadron Spectroscopy provides a realm to study the internal quark dynamics within the hadrons through phenomenological, theoretical as well as experimental approaches. In the present article, an attempt has been made to exploit the nucleon N resonances using a non-relativistic hypercentral Constituent Quark Model (hCQM). The properties are studied based on the linear nature of confining part of the potential. The 1S-5S, 1P-3P, 1D-2D and 1F states mostly with four star labelled resonances are explored again with the separation of charge states using different constituent quark masses. Also, Regge trajectories for some obtained states are plotted for examining the linear nature.


Author(s):  
T. G. Zhang ◽  
Y. H. Wang ◽  
L. N. Chen ◽  
L. R. Dai

The study of dibaryons has gained extensive attention both theoretically and experimentally since the confirmation of six-quark exotic [Formula: see text] dibaryon (with spin 3 and isospin 0) by recent COSY experiment. We ever proposed the chiral SU(3) quark model and predicted the binding energy of the [Formula: see text] system, in which the hidden-color channel was shown to play an important role in its structure. In this work, we further study the structure of [Formula: see text] dibaryon (with spin 0 and isospin [Formula: see text]) and strangeness [Formula: see text] under the chiral SU(3) quark model. The results show that hidden-color channel has an obvious influence on the binding energy of [Formula: see text] system.


2021 ◽  
Vol 36 (39) ◽  
Author(s):  
N. Tazimi ◽  
A. Ghasempour

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.


2021 ◽  
Vol 68 (1 Jan-Feb) ◽  
Author(s):  
M. Abu-shady ◽  
N. H. Gerish ◽  
M. M. A. Ahmed

The exotic particles such as the pentaquarks are to strengthen understanding of important interactions and the principle of QCD in which pentaquarks contain two heavy- valence quarks. The structure of two bodies including an antiquark and two-diquark is introduced. A new potential for quark interaction is suggested which includes the logarithm potential, the linear potential, and the spin-spin interaction. The suggested potential is included in the framework of spinless of Bethe-Salpeter equation. A comparison with other works is presented which provides a good description of pentaquarks.


2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Xin Jin ◽  
Yuheng Wu ◽  
Xuejie Liu ◽  
Hongxia Huang ◽  
Jialun Ping ◽  
...  

AbstractIn the framework of the chiral quark model (ChQM), we systematically investigate the strange hidden-charm tetraquark systems $$cs{\bar{c}}{\bar{u}}$$ c s c ¯ u ¯ with two structures: $$q{\bar{q}}-q{\bar{q}}$$ q q ¯ - q q ¯ and $$qq-{\bar{q}}{\bar{q}}$$ q q - q ¯ q ¯ . The bound-state calculation shows that there is no any bound state in present work, which excludes the molecular state explanation ($$D^{0}D_{s}^{*-}/D^{*0}D_{s}^{-}/D^{*0}D_{s}^{*-}$$ D 0 D s ∗ - / D ∗ 0 D s - / D ∗ 0 D s ∗ - ) of the reported $$Z_{cs}(3985)^{-}$$ Z cs ( 3985 ) - or $$Z_{cs}(4000)^{+}$$ Z cs ( 4000 ) + . However, the effective potentials for the $$cs-{\bar{c}}{\bar{u}}$$ c s - c ¯ u ¯ systems show the possibility of some resonance states. By applying a stabilization calculation and coupling all channels of both two structures, two new resonance states are obtained, which are the $$IJ^{P}=\frac{1}{2} 0^{+}$$ I J P = 1 2 0 + state with the energy around 4111–4116 MeV and the $$IJ^{P} =\frac{1}{2} 1^{+}$$ I J P = 1 2 1 + state with energy around 4113–4119 MeV, respectively. Both of them are worthy of search in future experiments. Our results show that the coupling calculation between the bound channels and open channels is indispensable to provide the necessary information for experiments to search for exotic hadron states.


2021 ◽  
Vol 104 (9) ◽  
Author(s):  
Gurjav Ganbold ◽  
Thomas Gutsche ◽  
Mikhail A. Ivanov ◽  
Valery E. Lyubovitskij

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Himanshu S. Sahoo ◽  
Supriya Karan ◽  
Rabindranath Mishra ◽  
Prafulla K. Panda

2021 ◽  
Vol 104 (9) ◽  
Author(s):  
Gang Yang ◽  
Jialun Ping ◽  
Jorge Segovia

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