Hadronic dynamical processes at High temperature/density
高温/密度下的强子动力学过程
基本信息
- 批准号:08640385
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1996
- 资助国家:日本
- 起止时间:1996 至 1998
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. The stochastic field equation was derived from the chiral symmetric meson model by the Caldeira-Leggett method with the elimination of the on-mass shell fluctuation on the condensates. We studied that equation and got the results : 1) With evaluating the asymptotic behavior, we showed the stochastic properties of the solution and got the stochastic coefficient algebraically. 2) We applied that equation to the neutral DCC process and found the meta-stability of the neutral DCC.3) The charged DCC was studied with the same method. We pointed that the charged DCC was a steady state. Its life-time was estimated . We also estimated the decay life-time with photon radiation and found the smallness of it. 4) As an application to other physical system, we made the derivation of stochastic/non-stochastic forces for the superfluid/spin vortices and their topological interpretations.2. To understand the spin polarization of hadrons generated in high-energy nucleon collisions, we formulated the unified theory on the basis of the quark recombinations and studied it numerically : 1) We found that the theory works well for the case of valence quark process. 2) We proposed the new reaction process with quark production in the early stage for no valence quark case. 3) The possibility of quark-parton spin polarization was pointed for the analyzing power for the Lambda hyperon produced in the polarized nucleon collision.3. The model studies were done to understand the energy stochastic mechanism with the energy flow from the collective degrees to the background degrees of freedom.4. We had a mini-workshop "Dynamical stochastic process in quantum many body system" at Tokyo Metropolitan University on Feb.2, 1999.
1.从手征对称介子模型出发,采用Caldeira-Leggett方法,消去凝聚体上的无质量壳层涨落,导出了随机场方程。我们研究了该方程,得到了如下结果:1)通过对解的渐近性态的估计,给出了解的随机性质,并用代数方法得到了随机系数。2)将该方程应用于中性DCC过程,得到了中性DCC的亚稳定性。3)用同样的方法研究了带电DCC过程。我们指出,充电DCC是一个稳定的状态。估计了它的寿命。我们还估算了光子辐射下的衰变寿命,发现衰变寿命很小。4)作为对其他物理系统的应用,我们推导了超流/自旋涡旋的随机/非随机力及其拓扑解释。为了理解高能核子碰撞中产生的强子的自旋极化,我们建立了基于夸克重组的统一理论,并对其进行了数值研究:1)我们发现该理论对价夸克过程的情况很适用。2)对于无价夸克的情况,我们提出了早期有夸克产生的新反应过程。3)指出了夸克-部分子自旋极化的可能性,为极化核子碰撞中产生的λ超子的分析能力提供了依据.通过模型研究,了解了能量从集体自由度流向背景自由度的随机机制. 1999年2月2日在东京都立大学举办了小型研讨会“量子多体系统中的动态随机过程”。
项目成果
期刊论文数量(43)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Yabu: "Dissipative field theory with the Caldeira-Leggett method and its application to disoriented chiral condensation" Progress of Theoretical Physics Supplement. 129. 231-233 (1997)
H.Yabu:“基于 Caldeira-Leggett 方法的耗散场论及其在迷失方向的手性凝聚中的应用”理论物理进展增刊。
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K.-I.Kubo: "Spin Poralization in the High Energy Inclusive Hadron Reaction and the Solution of a Puzzle in Hyperon Spin Physics" Proc.the 14th RCNP-OSAKA int.Symp on Nuclear Reaction Dynamics of Nucleon-Hadron Many Body System. 257 (1998)
K.-I.Kubo:“高能包容强子反应中的自旋极化和超子自旋物理难题的解决”Proc.the 14th RCNP-OSAKA int.Symp on Nuclear Reaction Dynamics of Nucleon-Hadron Many Body System.
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H.Toki: "Spin observables in High Energy Hadron-Hadron Collisions within the Relativistic Recombination Model" Nuclear Instrumental Method Phys.Res. A. 402. 294-297 (1998)
H.Toki:“相对论重组模型中高能强子-强子碰撞中的自旋可观测值”核仪器方法物理研究。
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T.Suzuki: "One- and two-photon spin-dependent excitations in polarized deuteron scattering" Proceeding of Int.Symp.on New Facet on Spin Giant Resonance. 403-413 (1998)
T.Suzuki:“偏振氘核散射中的一光子和二光子自旋相关激发”Int.Symp.on 自旋巨共振新方面的论文集。
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T.Suzuki: "One-and two-phonon spin-dependent excitations in polarized deuferon scattering" Proc.Int.Symp.on New Facet on Spin Giant Res.(印刷中). (1998)
T.Suzuki:“偏振氚子散射中的一声子和二声子自旋相关激发”Proc.Int.Symp.on New Facet on Spin Giant Res.(出版中)。
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YABU Hiroyuki其他文献
YABU Hiroyuki的其他文献
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{{ truncateString('YABU Hiroyuki', 18)}}的其他基金
Formations and Destructions of atomic and molecular condensates in ultracold atomic gas
超冷原子气体中原子和分子凝聚体的形成和破坏
- 批准号:
22540414 - 财政年份:2010
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Quantum correlation effects and Bose-Einstein condensation in molecular formations in the ultra-cold atomic gases
超冷原子气体分子结构中的量子相关效应和玻色-爱因斯坦凝聚
- 批准号:
17540371 - 财政年份:2005
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Dynamics of Atomic-Gas Bose-Einstein Condensates of Bose-Fermi Mixture
玻色-费米混合物的原子气玻色-爱因斯坦凝聚态动力学
- 批准号:
14540380 - 财政年份:2002
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
相似海外基金
Study on Quark-Gluon-Plasma in the High Energy Heavy Ion Collision
高能重离子碰撞中夸克-胶子-等离子体的研究
- 批准号:
63044034 - 财政年份:1988
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for international Scientific Research