论文标题
改进中型Parton分裂的不透明度扩展
Improved opacity expansion for medium-induced parton splitting
论文作者
论文摘要
我们重新审查了中诱导的Gluon辐射光谱的计算，并提出了一种新型的扩展方案，该方案包含两个已知的分析限制：i）由单个硬散射统治的高频制度，该方案与标准不透明度扩展中的领先顺序相对应，II）由多个软散射主导的低频状态。我们的方法是基于在领先的对数近似中围绕谐波振荡器而不是真空的扩展。我们计算了这一改进的不透明度扩展中的前两个订单，并表明它们解释了上述限制。
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.
