尖点疏导：射流疏导器过渡区的全阶预报
Grooming at the Cusp: All-Orders Predictions for the Transition Region of Jet Groomers
摘要：
射流疏导已成为一种必要的和重要的工具，以减轻污染辐射的射流。由修整器施加的对排放的附加限制可以导致在修整射流上测量的观测量的所得固定阶分布的非平滑行为。作为一个具体的例子，我们研究了软滴修饰的$e^+e^-\to$强子事件半球质量分布中的尖点。我们确定了领先的排放，有助于在该地区的尖点，并制定了一个全阶因式分解定理，描述了如何解决尖点通过任意强有序的软共线排放。因式分解定理具有许多新的功能，如贡献共线模式，可以跨越半球边界，以及需要明确减去的限制，其中解决的排放成为共线的硬核。我们提出了recremation的尖点区域，通过下一个领先的对数精度，并描述了它如何可以与建立的因式分解定理，描述其他梳理相空间区域相匹配。
英文摘要：
Jet grooming has emerged as a necessary and vital tool for mitigating contamination radiation in jets. The additional restrictions on emissions imposed by the groomer can result in non-smooth behavior of resulting fixed-order distributions of observables measured on groomed jets. As a concrete example, we study the cusp in the hemisphere mass distribution of $e^+e^-\to$ hadrons events groomed with soft drop. We identify the leading emissions that contribute in the region about the cusp and formulate an all-orders factorization theorem that describes how the cusp is resolved through arbitrary strongly-ordered soft and collinear emissions. The factorization theorem exhibits numerous novel features such as contributions from collinear modes that can cross hemisphere boundaries as well as requiring explicit subtraction of the limit in which resolved emissions become collinear to the hard core. We present resummation of the cusp region through next-to-leading logarithmic accuracy and describe how it can be matched with established factorization theorems that describe other groomed phase space regions.
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