核力和重子相互作用

本文评述了核力和重子相互作用研究的历程,取得的成就和存在的问题。     

组分夸克模型对重子共振态的纵向跃迁的相对论计算

相对论组态混合效应对重子共振态的纵向跃迁振幅S_1/2(Q²)的影响进行了讨论. 研究表明这种组态混合效应会对纵向跃迁振幅S_1/2(Q²)起着明显的作用.     

低动量末态粒子的模拟和探测对[I]^＊重子谱研究的影响

北京正负电子对撞机上的BES实验为系统地进行重子谱研究提供了一个很好的舞台，由于很多待研究的衰变道末态为多个小动量的粒子，给探测和分析带来困难．本工作以通过衰变道J／ψ→[I]^*∧K^-研究激发态为例，比较了不同模型的蒙特卡罗模拟，并结合实验数据，分析了该类型重子谱研究的探测限及产生子和探测器模拟对结果的影响。     

e+e－湮没过程的重子产生

本文指出(3/2)⁺与(1/2)⁺重子相对权重的改变对末态长寿命重子产额没有影响,而对(3/2)⁺重子产额改变显著.分析e⁺e^－实验资料发现对(3/2)⁺重子很强的抑制参数为0.3,由此得到的末态重子产额及产额比才能与实验符合.     

超子物理

评述了产生子的极化，重子八重的磁矩，弱辐射超子衰变，重子的半轻子衰变理论和实验的现状及待解决的问题。     

Bonn-Gatchina partial wave analysis

The present status of the Bonn-Gatchina partial wave analysis of the photoproduction and pion induced data is presented. An observation of signals which can be associated with new baryon resonances and possible interpretations of the baryon spectrum is discussed.     

B~0-B~0 Mixing in Local Gauged Baryon and Lepton Numbers

Using the effective Hamiltonian method, we analyze the B0-B0 mixing in the extension of the standard model （SM） where baryon number and lepton number are local gauge symmetries. The numerical results indicate the correction from the extra particles to the mass difference ArnB is significant. There is a 60% enhancement compared to the SM prediction for AraB at most, which agrees with the current experimental result.     

GRID Activities in ALICE

The challenge of LHC computing,with data rates in the range of several PB/year,requires the development of GRID technologies,to optimize the exploitation of distributed computing power and the authomatic access to distributed data storage.In the framework of the EU-DataGrid project,the ALICE experiment is one of the selected test applications for the early development and implementation of GRID Services.Presently,about 15 ALICE sites are makin use of available GRID tools and a large scale test production involving 9 of them was carried out with our simulation program.Results are discussed in detail,as well as future plans.     

Simple Classification of Light Baryons

We introduce a classification number n which describes the baryon mass information in a fuzzy manner. According to n and JP of baryons, we put all known light baryons in a simple table in which some baryons with same （n, J^p） are classified as members of known octets or decuplets. Meanwhile, we predict two new possible octets.