Tagging boosted hadronic objects with dynamical grooming

Mehtar-Tani, Yacine; Soto-Ontoso, Alba; Tywoniuk, Konrad

doi:10.1103/PhysRevD.102.114013

Title: Tagging boosted hadronic objects with dynamical grooming

Abstract

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 τ21 (τ32). 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.

Authors:

Mehtar-Tani, Yacine; Soto-Ontoso, Alba;

Publication Date:: 2020-12-07

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); Trond Mohn Foundation

OSTI Identifier:: 1734422

Alternate Identifier(s):: OSTI ID: 1763350

Report Number(s):: BNL-220906-2021-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 114013

Grant/Contract Number:: SC0012704; BFS2018REK01

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 102 Journal Issue: 11; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Perturbative QCD; quark & gluon jets; top quark; W & Z bosons

Citation Formats


                    Mehtar-Tani, Yacine, Soto-Ontoso, Alba, and Tywoniuk, Konrad. Tagging boosted hadronic objects with dynamical grooming.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevD.102.114013.

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                    Mehtar-Tani, Yacine, Soto-Ontoso, Alba, & Tywoniuk, Konrad. Tagging boosted hadronic objects with dynamical grooming.  United States.  https://doi.org/10.1103/PhysRevD.102.114013

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                    Mehtar-Tani, Yacine, Soto-Ontoso, Alba, and Tywoniuk, Konrad. Mon .  
"Tagging boosted hadronic objects with dynamical grooming".  United States.  https://doi.org/10.1103/PhysRevD.102.114013.

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@article{osti_1734422,

  title        = {Tagging boosted hadronic objects with dynamical grooming},

  author       = {Mehtar-Tani, Yacine and Soto-Ontoso, Alba and Tywoniuk, Konrad},

  abstractNote = {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 τ21 (τ32). 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.},

  doi          = {10.1103/PhysRevD.102.114013},

  journal      = {Physical Review D},

  number       = 11,

  volume       = 102,

  place        = {United States},

  year         = {2020},

  month        = {12}

}

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Title: Tagging boosted hadronic objects with dynamical grooming

Abstract

Citation Formats

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