Possible Signatures of the 2++ Glueball and Ω(2230)

Based on a bound constituent gluon picture and the gluon anomaly in QCD, I argue that the decay branching ratios of the 2++ glueball candidate ((2230) may satisfy B(Ω→ η'η')≥0.6B(Ω→ ηη'),B(Ω→ ηη')≥5.6B(Ω→ ηη),and B(Ω→ ηη)≥B(Ω→ππ). These features might provide a useful test for Ω(2230).     

张量胶子球ξ(2230)存在吗?

指出了张量胶子球ξ(2230)的宽度要比文献中所报告的20MeV宽.这个大的宽度并不能排除ξ(2230)作为一个胶子球的存在.但是,它解释了为什么在pp实验中看不到ξ(2230)存在的原因.因此,在pp实验中没观测到张量胶子球ξ(2230)存在的实验结果并不能排除张量胶子球的存在.     

2+1维SU(2)格点规范场胶球质量及胶球波函数的收敛行为

采用截断本征方程的方法研究2+1维SU（2）格点规范场的胶球质量及胶球波函数．计算结果表明五阶胶球质量△m／e     

J/ψ辐射衰变过程中产生的ξ(2230)的研究

用推广的矩分析方法研究了过程e⁺e^－→J/ψ→γ+X, X→pp, 得到了该过程的矩的表达式, 并用于确定衰变到pp的共振态X的自旋; 还给出了用矩关系式表示的过程的螺旋度振幅比.     

A high resolution search for the tensor glueball candidate ξ(2230)

We report results of a high resolution search for the tensor glueball candidate ξ(2230) in a formation experiment. π⁰π⁰ and ηη decay channels were measured in a scan of the mass region 2220 MeV to 2240 MeV. No evidence for the existence of ξ(2230) was found. 95% confidence upper limits for the possible existence of ξ are presented.     

Chiral Suppression and SU（3） Symmetry in Scalar Glueball Decays

We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.     

(2+1)维SU(3)0++胶球波函数

采用截断本征方程的方法,选择连接图作为独立图,计算(2+1)维SU(3)胶球波函数,其μ0F和μ2F表现出较好的标度行为.     

High-lying excited states in ~(10)Be from the ~9Be(~9Be,~(10)Be)~8Be reaction

A transfer-reaction experiment of ~9Be(~9Be,~(10)Be)~8Be was performed at a beam energy of 45 Me V.Excited states in ~(10)Be up to 18.80 Me V are produced using missing mass and invariant mass methods.Most of the observed high-lying resonant states,reconstructed from theα+~6He and t+~7Li decay channels,agree with the previously reported results.In addition,two new resonances at 15.6 and 18.8 Me V are identified from the present measurement.The 18.55 Me V state is found to decay into both the t + ~7Lig:s: and t + ~7Li?(0.478 MeV) channels, with a relative branching ratio of 0:93 ± 0:33. Further theoretical investigations are encouraged to interpret this new information on cluster structure in neutron-rich light nuclei.     

Glueball spectroscopy in 4d SU(3) lattice gauge theory (II)

We report on a Monte Carlo variational calculation of the SU(3) glueball mass spectrum on a 5³ · 8 lattice. This investigation relies on Wilson loops up to length 8. Within finite-size effects and statistical fluctuations our previous results from a 4³ · 8 lattice are confirmed: we find a scaling window for the 0⁺⁺ state, but no scaling for 15 other states considered.     

Picard-Fuchs Equation for Glueball Superfield for the SO(N) Gauge Group

In this paper, by using the factorization equation of the N = 2 supersymmetric gauge theory, we study N = 1 theory in Argyres-Douglas points. We suppose that all monopoles become massive. We derive general Picard-Fuchs equations for glueball superfields. These equations are hypergeometric equations and have regular singular points corresponding to Argyres-Douglas points. Furthermore, we obtain the solution of these differential equations.     

(2+1)-D SU(3)0++ Glueball Wavefunction

Adopting connected graphs as independent graphs, the(2+1)-D SU(3) 0⁺⁺ glueball wavefunction is calculated using scheme of truncating eigenvalue equations.     

A POSSIBLE INTERPRETATION FOR THE ξ(2.2) OBSERVED IN THE J/ψ RADIATIVE DECAYS

We interpret the ξ(2.2) as an orbitally excited (L=2) four quark state qsqs (q=u,d) which would decay into Kk via qq annihilation or rearrangement with a typical width of 0(10 MeV). The possibility of interpreting the θ(1.7) as an S-wave qsqs state is also discussed.     

（2十1）维SU（2）格点规范场胶球质量的解析计算

从连接图方案出发，计算０胶球质量，得到较好的标度行为．     

2+1维SU(3)0++胶球质量

提出变形集团展开法研究2+1维SU(3)格点规范场的胶球质量.这种方法采用相连空心图的线性组合作为试探波函数,并引入了Wilson圈图的平均值.计算结果表明,变形集团展开法的真空能量比普通集团展开法方法的真空能量低,0⁺⁺胶球质量m/e²的二阶和三阶结果在耦合常数β=4.5—8.0区间,表现出较好的标度行为和良好的收敛性.     

Applicability of ~9Be global optical potential to reactions of ~(7,10,11,12)Be

Elastic scattering angular distributions and total reaction cross-sections of ~(7,10,11,12)Be projectiles are predicted by the systematic ~9 Be global phenomenological optical model potential for target mass numbers ranging from24 to 209. These predictions provide a detailed analysis by their comparison with the available experimental data.Furthermore, these elastic scattering observables are also predicted for some targets out of the mass number range.The results are in reasonable agreement with the existing experimental data, and they are presented in this study.