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The d* dibaryon in the extended quark-delocalization, color-screening model  [PDF]
Jialun Ping,Fan Wang,T. Goldman
Physics , 2000, DOI: 10.1103/PhysRevC.65.044003
Abstract: The quark-delocalization, color-screening model, extended by inclusion of a one-pion-exchange (OPE) tail, is applied to the study of the deuteron and the d* dibaryon. The results show that the properties of the deuteron (an extended object) are well reproduced, greatly improving the agreement with experimental data as compared to our previous study (without OPE). At the same time, the mass and decay width of the d* (a compact object) are, as expected, not altered significantly.
Quark Delocalization, Color Screening and Dibaryons  [PDF]
Fan Wang,Jia-lun Ping,Guanh-han Wu,Li-jiang Teng,T. Goldman
Physics , 1995, DOI: 10.1103/PhysRevC.51.3411
Abstract: The quark delocalization and color screening model, a quark potential model, is used for a systematic search of dibaryon candidates in the $u,d$ and $s$ three flavor world. Color screening which appears in unquenched lattice gauge calculations and quark delocalization (which is similar to electron delocalization in molecular physics) are both included. Flavor symmetry breaking and channel coupling effects are studied. The model is constrained not only by baryon ground state properties but also by the $N$-$N$ scattering phase shifts. The deuteron and zero energy di-nucleon resonance are both reproduced qualitatively. The model predicts two extreme types of dibaryonic systems: ``molecular'' like the deuteron, and highly delocalized six-quark systems among which only a few narrow dibaryon resonances occur in the $u,d$ and $s$ three flavor world. Possible high spin dibaryon resonances are emphasized.
High strangeness dibaryons in the extended quark delocalization, color screening model  [PDF]
Hourong Pang,Jialun Ping,Fan Wang,T. Goldman,Enguang Zhao
Physics , 2003, DOI: 10.1103/PhysRevC.69.065207
Abstract: Dibaryon candidates with strangeness S=-2,-3,-4,-5,-6 are studied in terms of the extended quark delocalization and color screening model. The results show that there are only a few promising low lying dibaryon states: The H and di-Omega may be marginally strong interaction stable but model uncertainties are too large to allow any definitive statement. The SIJ=-3,1/2,2 N-Omega state is 62 MeV lower than the N-Omega threshold and 24 MeV lower than the Lambda-Xi-pi threshold. It might appear as a narrow dibaryon resonance and be detectable in the RHIC detector through the reconstruction of the vertex mass of the Lambda-Xi two body decay. The effects of explicit K and eta meson exchange have been studied and found to be negligible in this model. The mechanisms of effective intermediate range attraction, sigma meson exchange and kinetic energy reduction due to quark delocalization are discussed.
The di-Omega in the extended quark delocalization, color screening model  [PDF]
Hourong Pang,Jialun Ping,Fan Wang,T. Goldman
Physics , 2002, DOI: 10.1103/PhysRevC.66.025201
Abstract: The Omega-Omega (SIJ=-6,0,0) dibaryon state is studied with the extended quark-delocalization color-screening model including a pi meson exchange tail, which reproduces the properties of the deuteron quantitatively. We find the mass of the di-Omega to be about 45 MeV lower than the Omega-Omega threshold. The effect of channel coupling due to the tensor force has been calculated and found to be small in this case. We have also studied the effect of other pseudoscalar meson exchanges and sensitivity to the short-range cutoff radius, r_0, for the meson exchanges.
Dynamical calculation of $d^*$ mass and NN decay width in the quark delocalization, color screening model  [PDF]
Jialun Ping,Fan Wang,T. Goldman
Physics , 2000, DOI: 10.1016/S0375-9474(00)00593-5
Abstract: The mass estimate of the $d^* (IJ^P=03^+)$ dibaryon is improved by a dynamical calculation in the quark delocalization, color screening model. The partial decay width of $d^*$ into an $NN$ D-wave state is also obtained. The mass obtained is slightly larger than that obtained in adiabatic calculations, due to the anharmonicity of the effective potential between two $\Delta$'s. The value of the width obtained due to tensor one-gluon-exchange is about 5 MeV, comparable in magnitude to earlier results found using pion exchange.
Quark Delocalization, Color Screening, and Nuclear Intermediate Range Attraction  [PDF]
Fan Wang,Guang-han Wu,Li-jian Teng,T. Goldman
Physics , 1992, DOI: 10.1103/PhysRevLett.69.2901
Abstract: We consider the effect of including quark delocalization and color screening, in the nonrelativistic quark cluster model, on baryon-baryon potentials and phase shifts. We find that the inclusion of these additional effects allows a good qualitative description of both.
Quark Delocalization, Color Screening Model and Nucleon-Baryon Scattering  [PDF]
Guang-han Wu,Jia-Lun Ping,Li-jian Teng,Fan Wang,T. Goldman
Physics , 1998, DOI: 10.1016/S0375-9474(00)00141-X
Abstract: We apply the quark delocalization and color screening model to nucleon-baryon scattering. A semi-quantitative fit to N-N, N-Lambda and N-Sigma phase shifts and scattering cross sections is obtained without invoking meson exchange. Quarks delocalize reasonably in all of the different flavor channels to induce effective nucleon-baryon interactions with both a repulsive core and with an intermediate range attraction in the cases expected.
Effective Baryon-Baryon Potentials in the Quark Delocalization and Color Screening Model  [PDF]
Jia-Lun Ping,Fan Wang,T. Goldman
Physics , 1998, DOI: 10.1016/S0375-9474(99)00321-8
Abstract: The quark delocalization and color screening model is used for a systematic study of the effective potential between baryons in the u,d and s sector. The model is constrained by the properties of baryons and N-N scattering. The effective potentials for the N-N (IJ=01,10,11,00) channels and the N-Lambda and N-Sigma (IJ = (1/2)1, (1/2)0, (3/2)1, (3/2)0) channels fit the N-N, N-Lambda and N-Sigma scattering data reasonably well. This model predicts: There are rather strong effective attractions between decuplet-baryons; the effective attractions between octet-baryons are weak or even repulsive; and the attractions between decuplet- and octet-baryons lie in between.
The NN phase shifts in the extended quark-delocalization, color-screening model  [PDF]
Xi-Feng Lu,Jia-Lun Ping,Fan Wang
Physics , 2007, DOI: 10.1088/0256-307X/20/1/313
Abstract: An alternative method is applied to the study of nucleon-nucleon(NN) scattering phase shifts in the framework of extended quark delocalization, color-screening model(QDCSM), where the one-pion-exchange(OPE) with short-range cutoff is included.
Further study of the $NΩ$ dibaryon within constituent quark models  [PDF]
Hongxia Huang,Jialun Ping,Fan Wang
Physics , 2015, DOI: 10.1103/PhysRevC.92.065202
Abstract: Inspired by the discovery of the dibaryon $d^{*}$ and the experimental search of $N\Omega$ dibaryon with the STAR data, we study the strange dibaryon $N\Omega$ further in the framework of quark delocalization color screening model and chiral quark model. We have shown $N\Omega$ is a narrow resonance in $\Lambda\Xi$ D-wave scattering before. However, the $\Lambda$-$\Xi$ scattering data analysis is quite complicated. Here we calculate the low-energy $N\Omega$ scattering phase shifts, scattering length, effective range and binding energy to provide another approach of STAR data analysis. Our results show there exists an $N\Omega$ "bound" state, which can be observed by the $N$-$\Omega$ correlation analysis with RHIC and LHC data, or by the new developed automatic scanning system at J-PARC. Besides, we also find that the hidden color channel-coupling is important for the $N\Omega$ system to develop intermediate-range attraction.
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