Recursive Soft Drop

被引：42

作者：

Dreyer, Frederic A. ^{[1
]}

Necib, Lina ^{[2
]}

Soyez, Gregory ^{[3
]}

Thaler, Jesse ^{[1
]}

机构：

[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[2] CALTECH, Walter Burke Inst Theoret Phys, Pasadena, CA 91125 USA

[3] CEA Saclay, CNRS, UMR 3681, IPhT, F-91191 Gif Sur Yvette, France

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 06期

基金：

瑞士国家科学基金会;

关键词：

Jets; QCD Phenomenology; EFFECTIVE-FIELD THEORY; JET SUBSTRUCTURE; HEAVY; FACTORIZATION; RESUMMATION; COLLISIONS; DECAYS; SHAPES;

D O I：

10.1007/JHEP06(2018)093

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We introduce a new jet substructure technique called Recursive Soft Drop, which generalizes the Soft Drop algorithm to have multiple grooming layers. Like the original Soft Drop method, this new recursive variant traverses a jet clustering tree to remove soft wide-angle contamination. By enforcing the Soft Drop condition N times, Recursive Soft Drop improves the jet mass resolution for boosted hadronic objects like W bosons, top quarks, and Higgs bosons. We further show that this improvement in mass resolution persists when including the effects of pileup, up to large pileup multiplicities. In the limit that N goes to infinity, the resulting groomed jets formally have zero catchment area. As an alternative approach, we present a bottom-up version of Recursive Soft Drop which, in its local form, is similar to Recursive Soft Drop and which, in its global form, can be used to perform event-wide grooming.

引用

页数：34

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