arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.0666hep-ph
收藏

喷流猝灭和直接光子产生

Jet quenching and direct photon production

Fu-Ming Liu, Tetsufumi Hirano, Klaus Werner, Yan Zhu

摘要:

本文在对膨胀的热密物质进行实际数据约束的(3+1)维流体力学描述、合理处理部分子在流体中的传播和能量损失以及系统研究直接光子产生的主要来源的基础上,研究了直接光子产生中的喷流猝灭效应。我们得到的$\pt$光谱同意最近的PHENIX数据在一个广泛的$\pt$范围。等离子体中的部分子能量损失最终会显著影响碎片化和喷流光子转换的直接光子产生,类似于中心重离子碰撞中的强子抑制。但由于与其他直接光子源的混合,这仅导致直接光子的总产生量减少约40%。

英文摘要:

Jet quenching effect has been investigated in the direct photon production, based on a realistic data-constrained (3+1) dimensional hydrodynamic description of the expanding hot and dense matter, a reasonable treatment of the propagation of partons and their energy loss in the fluid, and a systematic study of the main sources of direct photons. Our resultant $\pt$ spectra agree with recent PHENIX data in a broad $\pt$ range. Parton energy loss in the plasma eventually effect significantly direct photon production from fragmentation and jet photon conversion, similar to hadron suppression in central heavy ion collisions. But this only causes about 40% decrease in the total production of direct photons, due to the mixture with other direct photon sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑