Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at $\sqrt{s} = 8$ TeV

ATLAS Collaboration

doi:10.1140/epjc/s10052-016-3978-z

Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at $\sqrt{s} = 8$ TeV

ATLAS Collaboration

Physics and Astronomy

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Abstract

This paper reports a detailed study of techniques for identifying boosted, hadronically decaying $W$ bosons using 20fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy $\sqrt{s} =$ 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying $W$ bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.

Original language	English
Pages (from-to)	154
Number of pages	70
Journal	Eur. Phys. J. C
Volume	76
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-016-3978-z
Publication status	Published - 20 Oct 2015

Bibliographical note

53 pages plus author list + cover page (70 pages total), 25 figures, 8 tables, submitted to Eur. Phys. J. C, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2015-03/

Keywords

hep-ex

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Cite this

@article{baded39abc1a4affb5ae46d469c009d8,

title = "Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at $\sqrt{s} = 8$ TeV",

abstract = "This paper reports a detailed study of techniques for identifying boosted, hadronically decaying $W$ bosons using 20fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy $\sqrt{s} =$ 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying $W$ bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman and Philip Allport and {Aperio Bella}, Ludovica and Matthew Baca and Juraj Bracinik and David Charlton and Andrew Chisholm and Andrew Daniells and Grzegorz Gach and Christopher Hawkes and Simon Head and Stephen Hillier and Mark Levy and Richard Mudd and {Murillo Quijada}, Javier and Konstantinos Nikolopoulos and Rhys Owen and Mark Slater and Jurgen Thomas and Paul Thompson and Alan Watson and Miriam Watson and John Wilson",

note = "53 pages plus author list + cover page (70 pages total), 25 figures, 8 tables, submitted to Eur. Phys. J. C, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2015-03/",

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pages = "154",

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T1 - Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at $\sqrt{s} = 8$ TeV

AU - ATLAS Collaboration

AU - Newman, Paul

AU - Allport, Philip

AU - Aperio Bella, Ludovica

AU - Baca, Matthew

AU - Bracinik, Juraj

AU - Charlton, David

AU - Chisholm, Andrew

AU - Daniells, Andrew

AU - Gach, Grzegorz

AU - Hawkes, Christopher

AU - Head, Simon

AU - Hillier, Stephen

AU - Levy, Mark

AU - Mudd, Richard

AU - Murillo Quijada, Javier

AU - Nikolopoulos, Konstantinos

AU - Owen, Rhys

AU - Slater, Mark

AU - Thomas, Jurgen

AU - Thompson, Paul

AU - Watson, Alan

AU - Watson, Miriam

AU - Wilson, John

N1 - 53 pages plus author list + cover page (70 pages total), 25 figures, 8 tables, submitted to Eur. Phys. J. C, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2015-03/

PY - 2015/10/20

Y1 - 2015/10/20

N2 - This paper reports a detailed study of techniques for identifying boosted, hadronically decaying $W$ bosons using 20fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy $\sqrt{s} =$ 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying $W$ bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.

AB - This paper reports a detailed study of techniques for identifying boosted, hadronically decaying $W$ bosons using 20fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy $\sqrt{s} =$ 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet substructure variables. The results of these studies in Monte Carlo simulations show that a simple pairwise combination of groomed jet mass and one substructure variable can provide a 50% efficiency for identifying $W$ bosons with transverse momenta larger than 200 GeV while maintaining multijet background efficiencies of 2-4% for jets with the same transverse momentum. These signal and background efficiencies are confirmed in data for a selection of tagging techniques.

KW - hep-ex

U2 - 10.1140/epjc/s10052-016-3978-z

DO - 10.1140/epjc/s10052-016-3978-z

M3 - Article

SN - 1434-6044

VL - 76

SP - 154

JO - Eur. Phys. J. C

JF - Eur. Phys. J. C

IS - 3

ER -

Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at $\sqrt{s} = 8$ TeV

Abstract

Bibliographical note

Keywords

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