通过J/Ψ→p p ,p N ,N N 衰变 ,研究了Roper共振态的混杂态结构对衰变角分布和分支比的影响 .计算结果表明 ,如果Roper共振态为纯混杂态 ,那么J/Ψ→p N ,N N 的角分布几乎相等 ,而J/Ψ衰变到混杂态的衰变宽度还不到J/Ψ→p p的 1% ...通过J/Ψ→p p ,p N ,N N 衰变 ,研究了Roper共振态的混杂态结构对衰变角分布和分支比的影响 .计算结果表明 ,如果Roper共振态为纯混杂态 ,那么J/Ψ→p N ,N N 的角分布几乎相等 ,而J/Ψ衰变到混杂态的衰变宽度还不到J/Ψ→p p的 1% ,给出了Γ(J/Ψ→N p ) /Γ(J/Ψ→p p)和Γ(J/Ψ→N N ) /Γ(J/Ψ→ p p)随混合参数的变化关系 ,并讨论了在J/Ψ衰变中研究Roper混杂态结构的可能性 .展开更多
The production of J/ψ mesons in p+p and p+Pb collisions is studied in the framework of color-glass condensate together with a simple color evaporation model.Considering the nuclear effects with the Glauber–Gribov ap...The production of J/ψ mesons in p+p and p+Pb collisions is studied in the framework of color-glass condensate together with a simple color evaporation model.Considering the nuclear effects with the Glauber–Gribov approach,we calculate the cross section and the nuclear modification factor of forward J/ψ production in p+Pb collisions at s^(1/2) 5:02 TeV.Then,the backward J/ψ production in p+Pb collisions at s^(1/2) 8:16 Te V is also analyzed.In our calculation,the phenomenology KLRAd S/CFT model and the rc BK approach,which are valid at a small x,are used to calculate the three-point function.It is shown that the theoretical results fit well with the experimental data from ALICE and LHCb.展开更多
Considering the volatility of the propagation path for charmonium passing across the nuclear target in J/ψ formation from p-A collisions, the charmonium energy loss is investigated using Salgado-Wiedemann quenching w...Considering the volatility of the propagation path for charmonium passing across the nuclear target in J/ψ formation from p-A collisions, the charmonium energy loss is investigated using Salgado-Wiedemann quenching weights. A successful description regarding J/ψsuppression of R_(w(Fe)/Be)(x_F) from the E866 experiment for 0.2 <x_F<0.65 gives the transport coefficient q = 0.29 ± 0.07 GeV^2/fm for the colored cc energy loss.The calculated result indicates that radiative energy loss of a parton should be independent of its mass at high energy.The calculations are further compared to LHC and RHIC measurements.展开更多
文摘通过J/Ψ→p p ,p N ,N N 衰变 ,研究了Roper共振态的混杂态结构对衰变角分布和分支比的影响 .计算结果表明 ,如果Roper共振态为纯混杂态 ,那么J/Ψ→p N ,N N 的角分布几乎相等 ,而J/Ψ衰变到混杂态的衰变宽度还不到J/Ψ→p p的 1% ,给出了Γ(J/Ψ→N p ) /Γ(J/Ψ→p p)和Γ(J/Ψ→N N ) /Γ(J/Ψ→ p p)随混合参数的变化关系 ,并讨论了在J/Ψ衰变中研究Roper混杂态结构的可能性 .
基金supported by the Natural Science Foundation of Hebei Province(A2012210043)
文摘The production of J/ψ mesons in p+p and p+Pb collisions is studied in the framework of color-glass condensate together with a simple color evaporation model.Considering the nuclear effects with the Glauber–Gribov approach,we calculate the cross section and the nuclear modification factor of forward J/ψ production in p+Pb collisions at s^(1/2) 5:02 TeV.Then,the backward J/ψ production in p+Pb collisions at s^(1/2) 8:16 Te V is also analyzed.In our calculation,the phenomenology KLRAd S/CFT model and the rc BK approach,which are valid at a small x,are used to calculate the three-point function.It is shown that the theoretical results fit well with the experimental data from ALICE and LHCb.
基金supported in part by the National Natural Science Foundation of China(No.11405043)the Natural Science Foundation of Hebei Province(No.A2018209269)
文摘Considering the volatility of the propagation path for charmonium passing across the nuclear target in J/ψ formation from p-A collisions, the charmonium energy loss is investigated using Salgado-Wiedemann quenching weights. A successful description regarding J/ψsuppression of R_(w(Fe)/Be)(x_F) from the E866 experiment for 0.2 <x_F<0.65 gives the transport coefficient q = 0.29 ± 0.07 GeV^2/fm for the colored cc energy loss.The calculated result indicates that radiative energy loss of a parton should be independent of its mass at high energy.The calculations are further compared to LHC and RHIC measurements.
