论文标题
标记带有动力修饰的增强的耐药物体
Tagging boosted hadronic objects with dynamical grooming
论文作者
论文摘要
我们评估了[1]中引入的动力修饰技术的现象学适用性，以在LHC条件下提高W和顶部标记。提出了我们用于多支出的方法的扩展，以内部的质量量表（例如顶级夸克衰减）。首先，我们解决了W和顶部喷气机的质量分布的重建，从而量化了由于堆积而引起的涂抹。与Softdrop（例如SoftDrop及其递归版本）等最先进的修饰算法相比，动态修饰显示出对背景波动的弹性增强。此外，我们通过执行两步分析来评估动力修饰的区分能力，以区分W（顶）JETS与QCD射流：引入W（Top）质量峰附近的修饰质量的削减，然后对N-Subjettinnes比率$τ_{21}} $（$τ_（$τ_{32} $）限制。对于W Jets，动态修饰的开箱即用版本，没有临时参数，结果与SoftDrop的性能相当。关于顶级标签仪效率，尽管它简单，但三方面的动态修饰比软盘具有更好的性能，并且与递归软盘相似。
We evaluate the phenomenological applicability of the dynamical grooming technique, introduced in [1], to boosted W and top tagging at LHC conditions. An extension of our method intended for multi-prong decays with an internal mass scale, such as the top quark decay, is presented. First, we tackle the reconstruction of the mass distribution of W and top jets quantifying the smearing due to pileup. When compared to state-of-the-art grooming algorithms like SoftDrop and its recursive version, dynamical grooming shows an enhanced resilience to background fluctuations. In addition, we asses the discriminating power of dynamical grooming to distinguish W (top) jets from QCD ones by performing a two-step analysis: introduce a cut on the groomed mass around the W (top) mass peak followed by a restriction on the N-subjettinnes ratio $τ_{21}$ ($τ_{32}$). For W jets, the out-of-the-box version of dynamical grooming, free of ad-hoc parameters, results into a comparable performance to SoftDrop. Regarding the top tagger efficiency, 3-prong dynamical grooming, in spite of its simplicity, presents better performance than SoftDrop and similar results to Recursive SoftDrop.
