检索结果-南通市图书馆

Debye Screening Mass at Next-to-Leading Order and Charmonium Deconfinement in the Quark-Gluon Plasma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第11期15卷 787-789页

作者： CheN Hong LIU BO he ze-jun Department of Physics Southwest China Normal UniversityChongqing 400715 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039 Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800

Debye screening mass at the next-to-leading order is studied by the resummation method based on perturbation theory at finite *** find that the critical temperature for the J/ψdissociation is 0.211 *** contributions from the next-to-leading order are important,and critical temperature and chemical potential are shifted lower values.

关键词： temperature Debye critical

Dependence of Dilepton Production in the Baryon-Rich Quark-Gluon Fireball on the Initial Temperature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第1期14卷 24-27页

作者： he ze-jun ZHANG Jia-ju QIU Xi-jun CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800

In the study of dilepton production of a baryon-rich quark-gluon fireball based on the full stopping scenario via a relativistic hydrodynamic model,it is found that for the fixed initial baryon chemical potential with increasing initial temperature a peak indicating the formation of the baryon-rich quark-gluon matter appears in the total dilepton yield.

关键词： quark lepton relativistic

Dilepton Distribution as a Signature for the Baryon-Rich Quark-Gluon Matter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第8期14卷 577-580页

作者： he ze-jun ZHANG Jia-ju WANG Zi-xing QIU Xi-jun CCAST(World Laboratory)P.O.Box 8730 Beijing 100080 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Computing Center Shanghai BranchChinese Academy of SciencesShanghai 200031

From the full stopping scenario,the dilepton production in the baryon-rich quark-gluon fireball based on a relativistic hydrodynamic model is studied,and it is found that with increasing incident energy a characterist... 详细信息

关键词： quark lepton relativistic

Dilepton Production in an Expanding Hot Baryon-Rich Quark-Gluon Matter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第4期16卷 259-261页

作者： he ze-jun ZHANG Jia-ju JIANG Wei-Zhou QIU Xi-jun LIU Bo Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of High Energy Chinese Academy of SciencesBeijing 100039

From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been *** on it,the rapidity Distribution of dileptons with intermediate invariant masses has been *** is found that the quark phase gives the dominant contribution to the dilepton spectrum due to the influence of the phase boundary on the evolution of the system,especially the dilepton yield is strongly suppressed with the increasing rapidity.

关键词： quark lepton invariant

Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第10期18卷 1331-1333页

作者： he ze-jun ZHOU Wen-Jie ZHANG Jia-Ju LIU Bo Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039

Dilepton production during the chemical equilibration of quark-gluon matter with a finite baryon density has been studied. We find that due to the slowing down of the cooling rate and the high initial temperature of the quark-gluon matter produced at RHIC energies, the quark phase contribution to dileptons with intermediate masses is significantly heightened and is much larger than that calculated by the evolution of the thermodynamic equilibrium system. The latter has shown an enhancement of intermediate mass dileptons from the quark phase. Therefore, such an enhancement of dileptons should be a signature for quark-gluon matter formation.

关键词： formation. quark phase.

Dilepton Production in an Expanding Hot Baryon-Rich Quark-Gluon Matter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第12期16卷 879-881页

作者： JIANG Wei-zhou he ze-jun ZHU Zhi-yuan ZHANG Jia-ju Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800

Under thermodynamic equilibrium, the initial values of the quark-gluon system from relativistic nucleus-nucleus collisions are obtained. From these initial values we have studied the dilepton production on the basis of the relativistic hydrodynamic model, and found that with increasing incident energy a characteristic plateau indicating the formation of the quark-gluon plasma appears in the total yield.

关键词： relativistic quark lepton

Intermediate Mass Dilepton Production in an Expanding Baryon-rich Quark--Gluon Matter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第2期18卷 199-201页

作者： he ze-jun JIANG Wei-Zhou ZHOU Wen-Jie ZHANG Jia-Ju Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800

The intermediate mass dileptons from the quark phase,secondary hadronic processes and background sources have been studied based on a relativistic hydrodynamic *** to the effect of the phase boundary on the evolution of the system the contribution from the quark phase is much more important than that from secondary processes and is even comparable with that from background *** leads to a spectrum without the obvious humps of the hadronic phase contribution and the yield increasing with the incident energy of colliding *** is shown that the enhancement of dileptons is a signature for the formation of the quark--gluon plasma.

关键词： quark signature relativistic

FDI行业内技术溢出与行业特征——基于中国高技术产业的实证分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

经济经纬 2011年第3期28卷 86-91页

作者：何泽军河南农业大学经济与管理学院河南郑州450002 武汉大学经济与管理学院湖北武汉430072

随着大量外资涌入中国,获得外资的技术溢出效应使之更好服务于产业创新能力提升成为研究热点。高技术产业以其高知识密集、高成长、高辐射的特点而成为促进产业结构调整和创新能力提升的重要力量。笔者运用面板数据分析方法,在考虑滞后... 详细信息

随着大量外资涌入中国,获得外资的技术溢出效应使之更好服务于产业创新能力提升成为研究热点。高技术产业以其高知识密集、高成长、高辐射的特点而成为促进产业结构调整和创新能力提升的重要力量。笔者运用面板数据分析方法,在考虑滞后期影响下,检验了中国高技术产业15个3位码行业1999年~2008年的FD I行业内技术溢出效应,并分析了效应显著行业所具有的特征。结果表明：电子元件制造、医疗设备及器械制造和仪器仪表制造溢出效应显著,且具有适中的内外资企业能力差距、较低的吸收能力、适中的外资参与度、较低的市场集中度以及适中的对外开放度等行业特征。

关键词：行业内技术溢出外商直接投资(FDI) 行业特征高技术产业

Production of dileptons with intermediate masses in an expanding quark-gluon matter

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2000年第3期11卷 183-186页

作者： he ze-jun, JIANG Wei-Zhou, ZHOU Wen-Jie, ZHANG Jia-Ju (Center of Theoretical Nuclear Physics, the National Laboratory of heavy Ion Accelerator, Lanzhou 750000 Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences Shanghai 201800) 兰州原子核理论研究中心重离子加速器国家实验室甘肃兰州 730000 中科院上海原子核所上海 201800

A study of dilepton spectra, in intermediate mass region (IMR), from main background sources, quark phase, and secondary processes in hadronic phase on the basis of a relativistic hydrodynadric model has been carried out. The comparison between these results indicates that in this mass region the contribution from the background sources dominates, and due to the effect of the phase boundary on the evolution of the system the contribution from the quark phase becomes more important than that from secondary processes.

关键词：粒子物理学轻子流体动力学模型产物夸克胶子 IMR 强子