期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP05(2014)146
关键词
QCD Phenomenology; Jets
资金
- U.S. Department of Energy (DOE) [DE-FG02-05ER-41360]
- DOE [DE-FG02-11ER-41741]
- Sloan Research Fellowship from the Alfred P. Sloan Foundation
- UK Science & Technology Facilities Council (STFC)
- French Agence Nationale de la Recherche [ANR-10-CEXC-009-01]
- EU ITN grant LHCPhenoNet [PITN-GA-2010-264564]
We introduce a new jet substructure technique called soft drop declustering, which recursively removes soft wide-angle radiation from a jet. The soft drop algorithm depends on two parameters - a soft threshold z(cut) and an angular exponent beta - with the beta = 0 limit corresponding roughly to the (modified) mass drop procedure. To gain an analytic understanding of soft drop and highlight the beta dependence, we perform resummed calculations for three observables on soft-dropped jets: the energy correlation functions, the groomed jet radius, and the energy loss due to soft drop. The beta = 0 limit of the energy loss is particularly interesting, since it is not only Sudakov safebut also largely insensitive to the value of the strong coupling constant. While our calculations are strictly accurate only to modified leading-logarithmic order, we also include a discussion of higher-order effects such as multiple emissions and (the absence of) non-global logarithms. We compare our analytic results to parton shower simulations and find good agreement, and we also estimate the impact of non-perturbative effects such as hadronization and the underlying event. Finally, we demonstrate how soft drop can be used for tagging boosted W bosons, and we speculate on the potential advantages of using soft drop for pileup mitigation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据