We study the ground-state properties of the _(YY)^(6)He double hyperon for _(ΛΛ)^(6)He and _(ΩΩ)^(6)He nuclei in a threebody model(Y+Y+α).We solve two coupled Faddeev equations corresponding to the three-body con...We study the ground-state properties of the _(YY)^(6)He double hyperon for _(ΛΛ)^(6)He and _(ΩΩ)^(6)He nuclei in a threebody model(Y+Y+α).We solve two coupled Faddeev equations corresponding to the three-body configurations(αY,Y)and(YY,α)in configuration space with the hyperspherical harmonics expansion method by employing the most recent hyperon-hyperon interactions obtained from lattice QCD simulations.Our numerical analysis for _(ΛΛ)^(6)He,using threeΛΛlattice interaction models,leads to a ground state binding energy in the(-7.468,-7.804)MeV domain and the separations <r_(Λ-Λ)>and <r_(α-Λ)>in the domains of(3.555,3.629)fm and(2.867,2.902)fm,respectively.The binding energy of the double-Ω hypenucleus _(ΩΩ)^(6)He leads to -67.21 MeV and consequently to smaller separations <r_(Ω-Ω)>=1.521 fm and <r_(α-Ω)>=1.293 fm.In addition to geometrical properties,we study the structure of ground-state wave functions and show that the main contributions are from the s-wave channels.Our results are consistent with the existing theoretical and experimental data.展开更多
In this work,the strong decay behaviors of theλ-mode low-lyingΞ_(b) andΞ^(’)_(b) baryons are investigated within the 3 P0 model.Our results suggest that all of the low-lying 3F statesΞ_(b)(2 S),Ξ_(b)(1 P),andΞ_...In this work,the strong decay behaviors of theλ-mode low-lyingΞ_(b) andΞ^(’)_(b) baryons are investigated within the 3 P0 model.Our results suggest that all of the low-lying 3F statesΞ_(b)(2 S),Ξ_(b)(1 P),andΞ_(b)(1 D)have small decay widths of less than 20 MeV,and these states have good potentials to be observed in theΞ^(’)_(b)πandΞ^(’)_(b)^(*)πinvariant masses.Further,most of the 6F multiplets are relatively narrow and may decay into theΞ_(b)π,Ξ^(’)_(b)π,Ξ^(’)_(b)^(^(*))π,andΔbK final states.Considering the masses and strong decay behaviors,we can assign the newly observedΞ_(b)(6100)resonance as theΞ_(b)(1 P)state with J^(P)=3/2-and interpret theΞ_(b)(6227)structure as the J^(P)=3/2-Ξ^(’)_(b)(1 P)state with a proper mixing angle.We expect that our predictions for these excited bottom strange baryons will provide helpful information for future experimental research.展开更多
In this talk, we briefly review the experimental status of newly observed charmed hadrons during the past years. Then we introduce the theoretical progresses on these charmed hadrons, especially our studies on the str...In this talk, we briefly review the experimental status of newly observed charmed hadrons during the past years. Then we introduce the theoretical progresses on these charmed hadrons, especially our studies on the strong decays of new charmed hadrons during the past one year.展开更多
We present the physics program of the open charm and heavy cc states above the DD production energy threshold, which will be studied with the BES-Ⅲ detector at the BEPC- Ⅱ collider in the coming years. Based on some...We present the physics program of the open charm and heavy cc states above the DD production energy threshold, which will be studied with the BES-Ⅲ detector at the BEPC- Ⅱ collider in the coming years. Based on some full Monte Carlo simulations with the BES-Ⅲ detector, we predict the accuracy levels on measuring some physical quantities related to D^0, D^＋ and Ds^＋ decays as well as some non-charmed decays of the heavy cc states.展开更多
基金Supported by the National Science Foundation under Grant No.NSF-PHY-2000029 with Central State University。
文摘We study the ground-state properties of the _(YY)^(6)He double hyperon for _(ΛΛ)^(6)He and _(ΩΩ)^(6)He nuclei in a threebody model(Y+Y+α).We solve two coupled Faddeev equations corresponding to the three-body configurations(αY,Y)and(YY,α)in configuration space with the hyperspherical harmonics expansion method by employing the most recent hyperon-hyperon interactions obtained from lattice QCD simulations.Our numerical analysis for _(ΛΛ)^(6)He,using threeΛΛlattice interaction models,leads to a ground state binding energy in the(-7.468,-7.804)MeV domain and the separations <r_(Λ-Λ)>and <r_(α-Λ)>in the domains of(3.555,3.629)fm and(2.867,2.902)fm,respectively.The binding energy of the double-Ω hypenucleus _(ΩΩ)^(6)He leads to -67.21 MeV and consequently to smaller separations <r_(Ω-Ω)>=1.521 fm and <r_(α-Ω)>=1.293 fm.In addition to geometrical properties,we study the structure of ground-state wave functions and show that the main contributions are from the s-wave channels.Our results are consistent with the existing theoretical and experimental data.
基金supported by the National Natural Science Foundation of China(Grant Nos.11705056,11975245,U1832173,and 11475192)the Sino-German CRC 110 Symmetries and the Emergence of Structure in QCD Project by Na-tional Natural Science Foundation of China(Grant No.12070131001)+1 种基金the Key Research Program of Frontier Sciences,CAS(Grant No.Y7292610K1)the National Key Research and Development Program of China(Grant No.2020YFA0406300).
文摘In this work,the strong decay behaviors of theλ-mode low-lyingΞ_(b) andΞ^(’)_(b) baryons are investigated within the 3 P0 model.Our results suggest that all of the low-lying 3F statesΞ_(b)(2 S),Ξ_(b)(1 P),andΞ_(b)(1 D)have small decay widths of less than 20 MeV,and these states have good potentials to be observed in theΞ^(’)_(b)πandΞ^(’)_(b)^(*)πinvariant masses.Further,most of the 6F multiplets are relatively narrow and may decay into theΞ_(b)π,Ξ^(’)_(b)π,Ξ^(’)_(b)^(^(*))π,andΔbK final states.Considering the masses and strong decay behaviors,we can assign the newly observedΞ_(b)(6100)resonance as theΞ_(b)(1 P)state with J^(P)=3/2-and interpret theΞ_(b)(6227)structure as the J^(P)=3/2-Ξ^(’)_(b)(1 P)state with a proper mixing angle.We expect that our predictions for these excited bottom strange baryons will provide helpful information for future experimental research.
基金Supported by National Natural Science Foundation of China (10421503,10625521,10705001)China Postdoctoral Science Foundation (20060400376)
文摘In this talk, we briefly review the experimental status of newly observed charmed hadrons during the past years. Then we introduce the theoretical progresses on these charmed hadrons, especially our studies on the strong decays of new charmed hadrons during the past one year.
基金Supported by National Natural Science Foundation of China (10935007)National Key Basic Research Program (973 by MOST) (2009CB825200XX)
文摘We present the physics program of the open charm and heavy cc states above the DD production energy threshold, which will be studied with the BES-Ⅲ detector at the BEPC- Ⅱ collider in the coming years. Based on some full Monte Carlo simulations with the BES-Ⅲ detector, we predict the accuracy levels on measuring some physical quantities related to D^0, D^＋ and Ds^＋ decays as well as some non-charmed decays of the heavy cc states.
