arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1102.2528hep-ph
收藏

介质感应辐射中的角序

On angular ordering in medium-induced radiation

K. Tywoniuk

摘要:

在重离子碰撞中单强子谱中,介质诱导的胶子辐射引起了强烈的能量损失。它的角结构,例如导致喷流内的相关性,只在包含一个胶子的情况下才知道。在真空中,当考虑由于相消干涉效应而导致的不太包容的分布时,出现了诸如角排序之类的性质。我们提出了一个计算,其中考虑到在介质中的干涉效应的设置,在该设置中,我们认为胶子辐射的夸克反夸克对具有给定的开度角。令人惊讶的是,计算的光谱在领先的日志精度,我们发现,存在的顺序是完全相反的,在真空中。我们估计的影响,随着讨论的影响,这种“反角排序”在重离子碰撞喷流物理的大小。

英文摘要:

Medium-induced gluon radiation gives rise to the strong energy-loss observed in single-hadron spectra in heavy-ion collisions. Its angular structure, leading e.g. to intra-jet correlations, is only known for the one-gluon inclusive case. In the vacuum, properties such as angular ordering appear when considering less inclusive distributions due to destructive interference effects. We present a calculation which takes into account interference effects in a medium for a setup in which we consider gluon radiation off a quark-antiquark pair with a given opening angle. Surprisingly, computing the spectrum at leading-log accuracy we find that an ordering exists which is exactly opposite from that in the vacuum. We estimate the magnitude of the effect along with a discussion of the implications of such "anti-angular ordering" on jet physics in heavy-ion collisions.

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。

↑