Hard QCD Processes in Relativistic Heavy Ion Collisions

相对论性重离子碰撞中的硬 QCD 过程

• 批准号: 5439671
• 负责人: Professor Dr. Hans-Jürgen Pirner
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5439671?language=en
• 关键词: Hard; QCD; Processes; Relativistic; Heavy

This project is aimed at an improvement of theoretical description of hard QCD processes which are an important part of the experimental program on heavy ion collisions at CERN SPS, RHIC at Brookhaven Lab, and at the forthcoming nuclear collider LHC at CERN. Hard reactions are employed as a probe for the matter produced by colliding heavy ions. This task demands a reliable understanding of the underlying dynamics. Based on our previous experience we are going to work on: (i) Initial state effects in hadron production with large pT. At the energy of LHC these probes are strongly affected by coherence effects which are of moderate importance at RHIC and hardly visible at SPS. A phenomenology able to describe available data for high pT hadrons including flavor dependence is to be developed; (ii) Final state interaction in high-pT hadron production. A realistic model for in-medium hadronization including the finite production length effects is to be developed and tested with data on deep-inelastic scattering off nuclei; (iii) The recent results from RHIC for heavy flavor production in deuteron-gold collisions have demonstrated lack of understanding of the dynamics of initial state interactions in these processes. A model able to describe J/q, D rapidity dependence in an wide energy range from SPS to RHIC will be developed.

该项目旨在改进硬QCD过程的理论描述，这是CERN SPS，布鲁克海文实验室RHIC和即将到来的CERN核对撞机LHC重离子碰撞实验计划的重要组成部分。硬反应被用来探测重离子碰撞产生的物质。这项任务需要对潜在的动态有可靠的理解。根据我们以前的经验，我们将研究：（i）大pT强子产生中的初态效应。在LHC的能量下，这些探针受到相干效应的强烈影响，相干效应在RHIC中具有中等重要性，在SPS中几乎不可见。有待开发一种能够描述高pT强子可用数据（包括风味依赖性）的现象学;（ii）高pT强子产生中的终态相互作用。一个现实的模型在介质强子化，包括有限的生产长度的影响是开发和测试的数据，深非弹性散射核;（三）最近的结果从RHIC重味生产的氘-金碰撞表明缺乏了解的动力学在这些过程中的初始状态相互作用。将发展一个能描述从SPS到RHIC宽能区J/q，D快度依赖关系的模型。