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 2003.02884hep-phnucl-th
收藏

介质诱导部分子分裂的改进不透明度展开

Improved opacity expansion for medium-induced parton splitting

Yacine Mehtar-Tani

摘要:

我们重新计算了介质诱导胶子辐射谱,并提出了一种新的扩展方案,包括两个已知的分析极限:i)高频区由一个单一的硬散射,对应于标准不透明度扩展中的领先秩序,ii)低频区由多个软散射主导。我们的方法是基于扩展周围的谐振子,而不是真空的领先对数近似。我们计算的前两个订单,在这种改进的不透明度扩展,并表明,他们占上述限制。

英文摘要:

We revisit the calculation of the medium-induced gluon radiative spectrum and propose a novel expansion scheme that encompasses the two known analytic limits: i) the high frequency regime dominated by a single hard scattering that corresponds to the leading order in the standard opacity expansion, ii) the low frequency regime that is dominated by multiple soft scatterings. Our approach is based on expanding around the harmonic oscillator instead of vacuum in the leading logarithmic approximation. We compute the first two orders in this improved opacity expansion and show that they account for the aforementioned limits.

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。

↑