H3^＋和H4^＋分子的几何构型与性质

用从头算法得到Ｈ３＾＋只有唯一构型，而Ｈ４＾＋则有１０种不同的可能构型存在，其中包括Ｄ２ｈ、Ｄ∞ｈ、Ｃ３ｖ、Ｃ２ｖ等不同的几何构型。同时，计算表明Ｈ４＾＋和Ｈ４＾＋是不能稳定存在的，并详细地讨论了其Ｊａｈｎ－Ｔｅｌｌｅｒ效应。     

Dissociation and Coulomb Explosion of H2^4＋ in S^q＋ ＋H2 Collisions

We have investigated fragment emission from molecularions in H2^r collisions between S^q and H2 with incident energies of 12.5, 15.625, 18.75, 21.875, 25, 28.125, 31.25, 34.375, 37.5, 40.625, and 43.75 keV/u, respectively. The energy distributions of the fragments are measured by time-of-flight techniques. The experimental results show evidences for molecular Coulomb explosion and dissociation. A program[1] is estab-lished based on the Monte Carlo technique to simulate the time-of-flight spectrum of fragment ions with different initialkinetic energy in ion-Molecule collisions. Simulations are done for S^2 H2 collisions and compared with experimental results.     

Radiative Decays of （0^＋, 1^＋） Strange-Bottom Mesons

In this article, we assume that the （0^＋,1^＋） strange-bottom mesons are the conventional bs mesons, and calculate the electromagnetic coupling constants d, g1, g2, and g3 using the light-cone QGD sum rules. Then we study the radiative decays Bs0→Bs^＊γ, Bs1→Bsγ, Bs1→Bs^＊γ, and Bs1→Bs0γ, and observe that the widths are rather narrow. We can search for the （0^＋, 1^＋） strange-bottom mesons in the invariant Bsπ^0 and Bs^＊π^0 mass distributions in the strong decays or in the invariant Bs^＊γ, and Bsγ mass distributions in the radiative decays.     

电子与H3^＋离子碰撞中的Balmer α,β,γ发射

最近，我们利用光学多道分析器对电子与Ｈ３＾＋郭子交叉束碰撞诱发的激发态进行了实验研究，观察到了碰撞中的发射光谱和激发通道，测量了激发截面随能量变化的依赖关系，定性讨论了复合分解激发机制问题。     

Chiral Lagrangian Treatment of 0^＋＋ Mesons and 0^＋＋ Glueballs

Within the framework of a nonlinear chiral Lagrangian the mass spectra and the decay properties of 0^＋＋ states below 2 GeV are studied. Assuming that f0（980）, a0（980）, K0（1430）, and f0（1500） comprise an SU（3） nonet, we make a detailed prediction about the static properties of the 0^＋＋ mesons. The substructure analysis of these states in terms of two- and four-quark components as well as a glueball component is carried out. We also consider the interaction Lagrangian and provide a preliminary study of the strong and radiative decays of the 0＋＋ mesons. The scalar glueball masses and partial widths are also presented. In view of the fact that few data of 0＋＋ mesons are clearly given in the present PDG （Particle Data Group） list and that the four-quark content of mesons is a hot issue both experimentally and theoretically, the predicted results of the paper may be helpful for upcoming experimental and theoretical studies of these mesons.     

用含时波包理论处理HD＋H→H＋DH,D＋H2反应

用含时波包（ＴＤＷＰ）理论计算了具有两个不同产物道的反应ＨＤ＋Ｈ→Ｈ＋ＤＨ，Ｄ＋Ｈ２的初态确定的反应几率及生咸物的分支比。在利用分解算符法进行波包传播的过程中，采取了分立变量表象（ＤＶＲ）及分立交量－有限基表象（ＤＶＲ—ＦＢＲ）变换，这一方法降低了传播过程中需保存大变换矩阵的要求。通过应用能量投影法，可从单一波包中抽出许多能量确定的动力学信息。为了避免因所选取的格点范围有限而引起的波函数在边界点附近的反射，传播过程中还采用了光学势以吸收反射波函。     

Charge exchange in collisions of H2^＋ with H^-

The process of mutual neutralization in slow H2^＋ H^- collisions is considered within the multi-channelLandau-Zener model. The calculated total mutual neutralization cross section is in satisfactory agreement with theexperimental data available in the CM energy range 20-2000 eV.     

H4^＋团簇离子的形成和分解

简报报告了１．８ＭｅＶ的Ｈ＋４团簇离子及其产物的测量结果。讨论了Ｈ＋４的形成和分解反应。     

强激光场中H2^＋离解行为的研究

在多电子态模型下，利用二阶劈裂传播子算法计算了Ｈ２＾＋在强激光场中的离散行为。结果发现在高频场时分子的多光子离散碎片是近对称的，而对于低频场，在所考虑的激光强度下Ｈ２＾＋是被隧道离散的，因而其离散碎片Ｈ＾＋分布是反对称的，另外，文中还探讨了三脉冲形状对分子离解几率、离解碎片动力学行为的影响。     

New Physics Effects on Rare Decays Bu^＋ → π^＋e^＋e^-, ρ^＋e^＋e^- in a Top Quark Two-Higgs-Doublet Model

Using the form factors from light-cone sum rules, we study the branching ratios and forward-backward asymmetries （FBAs） of the exclusive decays Bu^＋→π^＋e^＋e^- and Bu^＋ →ρ^＋e^＋e^- （e= e,μ） in the standard model （SM） and the top quark two-Higgs-doublet model （T2HDM）. From the numerical results, we find that the new physics contributions cannot provide very large enhancement to the branching ratios and the theoretical predictions are in good agreement with the SM ones. The T2HDM effects on FBAs of these decays are small. Precision measurements of the dilepton invariant mass distributions, especially in the lower dilepton mass region, and the FBAs in the decays Bu^＋ → π^＋ （ρ^＋ ）e^＋ e^- will greatly help in discriminating among the SM and the new physics models.     

NeH2^＋体系的势能函数与动力学研究（二）Ne＋H2^＋（v）与NeH^…

基于多体项展式方法所导出的ＮｅＨ２＾＋（＾２Σ＾＋）的分析势能函数，用准经典的Ｍｏｎｔｅ－Ｃａｒｌｏ轨迹法研究了Ｎｅ＋Ｈ２＾＋（ｖ）→ＮｅＨ＾＋＋Ｈ、Ｎｅ＋Ｈ２＾＋（ｖ）→Ｎｅ＋Ｈ＋Ｈ＾＋和ＮｅＨ＾＋＋Ｈ→Ｈ２＾＋＋Ｎｅ的反应动力学。研究表明，前两个反应在Ｈ２＾＋的初始振动基态时的反应阈能分别为１６ｋｃａｌ·ｍｏｌ＾－１和６２ｋｃａｌ·ｍｏｌ＾－１，反应阈能随振动量子数增大而减小。最后一个反应是无     

B→0^＋（1^＋）＋ missing energy in unparticle physics

We examine the effects of an unparticle U as a possible source of missing energy in the p-wave decays of a B meson. The dependence of the differential branching ratio on the K0^＊ （K1） - meson＇s energy is discussed in the presence of scalar and vector unparticle operators and significant deviation from the standard model value is found after addition of these operators. Finally, we have shown the dependence of the branching ratio for the above-mentioned decays on the parameters of unparticle stuff like effective couplings, cutoff scale Au and the scale dimensions du.     

中高能电子和N2（^1Σ^＋g）,CO（^1Σ^＋）弹性散射全截面的计算

此文采用由原子轨道线性组合构成的自洽场分子轨道，用一级玻恩近似计算了能量为１００－５０００ｅＶ的电子与Ｎ２（＾１Σ＾＋ｇ、ＣＯ（＾１Σ＾＋）弹性散射的微分截面和全截面。由于采用Ｇａｕｓｓ函数的线性组合拟合Ｓｌａｔｅｒ函数的方法，得到了弹性散射微分截面的解析表达式，使计算大大简化，计算得到的电子和Ｎ２，ＣＯ散射的总截面和实验结果进行了比较，当入射电子的能量大于１ｋｅＶ时，理论值和实验值之间符合得很好     

H4^＋的稳定性及形成和分解过程实验研究

利用Penning ion trap获得了七种不同延时时间（即反应时间）的离子谱Hn^ (n≤4),用充分的实验数据证实了H4^ 是稳定的,稳定时间达1秒量级。实验结果显示：H4^ 是经合成反应H2^ H2→H4^ ,H3^ H H2→H4^ H2产生的;H4^ 的分解产物是H3^ Ho分析得出：H4^ 构型为H3^ -核构型。