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Recursive Soft Drop

Dreyer, Frédéric A. and Necib, Lina and Soyez, Gregory and Thaler, Jesse (2018) Recursive Soft Drop. Journal of High Energy Physics, 2018 (6). Art. No. 93. ISSN 1126-6708. doi:10.1007/JHEP06(2018)093.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Necib, Lina0000-0003-2806-1414
Additional Information:© 2018 The Author(s). This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: April 18, 2018; Accepted: June 13, 2018; Published: June 20, 2018. We would like to thank Yang-Ting Chien, Andrew Larkoski, and Ian Moult for useful discussions, as well as Mrinal Dasgupta and Simone Marzani for comments on the manuscript. FD is supported by the SNF grant P2SKP2_165039. FD and JT are supported by the Office of High Energy Physics of the U.S. Department of Energy (DOE) under grant DE-SC-0012567. GS's work is supported in part by the French Agence Nationale de la Recherche, under grant ANR-15-CE31-0016. LN's work is supported by the DOE under Award Number DE-SC-0011632, and the Sherman Fairchild fellowship.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)P2SKP2_165039
Department of Energy (DOE)DE-SC-0012567
Agence Nationale pour la Recherche (ANR)ANR-15-CE31-0016
Department of Energy (DOE)DE-SC-0011632
Sherman Fairchild FoundationUNSPECIFIED
Subject Keywords:Jets; QCD Phenomenology
Issue or Number:6
Record Number:CaltechAUTHORS:20180621-093615272
Persistent URL:
Official Citation:Dreyer, F.A., Necib, L., Soyez, G. et al. J. High Energ. Phys. (2018) 2018: 93.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87300
Deposited By: Tony Diaz
Deposited On:21 Jun 2018 17:07
Last Modified:15 Nov 2021 20:47

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