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Title: Recursive Soft Drop

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics
  3. Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA), Saclay (France). Institut de Physique Théorique
Publication Date:
Research Org.:
California Inst. of Tech., Pasadena, CA (United States); Massachusetts Inst. of Tech., Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1499467
Grant/Contract Number:  
SC0011632; SC0012567
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jets; QCD Phenomenology

Citation Formats

Dreyer, Frédéric A., Necib, Lina, Soyez, Gregory, and Thaler, Jesse. Recursive Soft Drop. United States: N. p., 2018. Web. doi:10.1007/jhep06(2018)093.
Dreyer, Frédéric A., Necib, Lina, Soyez, Gregory, & Thaler, Jesse. Recursive Soft Drop. United States. doi:10.1007/jhep06(2018)093.
Dreyer, Frédéric A., Necib, Lina, Soyez, Gregory, and Thaler, Jesse. Wed . "Recursive Soft Drop". United States. doi:10.1007/jhep06(2018)093. https://www.osti.gov/servlets/purl/1499467.
@article{osti_1499467,
title = {Recursive Soft Drop},
author = {Dreyer, Frédéric A. and Necib, Lina and Soyez, Gregory and Thaler, Jesse},
abstractNote = {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.},
doi = {10.1007/jhep06(2018)093},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2018,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
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