Tools for estimating fake/non-prompt lepton backgrounds with the ATLAS detector at the LHC - INSPIRE

Tools for estimating fake/non-prompt lepton backgrounds with the ATLAS detector at the LHC

ATLAS

Collaboration

Nov 29, 2022

62 pages

Published in:

JINST 18 (2023) 11, T11004

Published: Nov 30, 2023

e-Print:

2211.16178 [hep-ex]

DOI:

10.1088/1748-0221/18/11/T11004

Report number:

CERN-EP-2022-214

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (IOP)

Measurements and searches performed with the ATLAS detector at the CERN LHC often involve signatures with one or more prompt leptons. Such analysesare subject to `fake/non-prompt' lepton backgrounds, where either a hadron or a lepton from a hadron decay or an electron from a photon conversion satisfies the prompt-leptonselection criteria. These backgrounds often arise within a hadronic jet because of particle decays in the showering process, particle misidentification or particleinteractions with the detector material. As it is challenging to model these processes with high accuracy in simulation, their estimation typically uses data-driven methods.Three methods for carrying out this estimation are described, along with their implementation in ATLAS and their performance.

Note:

62 pages in total, author list starting page 45, 18 figures, 2 tables, published by JINST. All figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EGAM-2019-01/

Analysis and statistical methods
Particle identification methods
p p: scattering
p p: colliding beams
jet: hadronic
photon: transition
hadron: decay
particle: interaction
lepton: particle identification
background

References(49)

Figures(47)

[1]

The ATLAS Experiment at the CERN Large Hadron Collider

ATLAS

Collaboration

•

G. Aad
(
- Marseille, CPPM
)

et al.

- JINST 3 (2008) S08003
•
DOI:
- 10.1088/1748-0221/3/08/S08003

[2]

Electron and photon performance measurements with the ATLAS detector using the 2015–2017 LHC proton-proton collision data

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- JINST 14 (2019) 12, P12006
•
e-Print:
- 1908.00005
•
DOI:
- 10.1088/1748-0221/14/12/P12006

[3]

Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 81 (2021) 7, 578
•
e-Print:
- 2012.00578
•
DOI:
- 10.1140/epjc/s10052-021-09233-2

[4]

Extraction of the width of the $W$ boson from measurements of $\sigma(p\bar{p} \to W + X) \times B(W \to e \nu)$ and $\sigma(p\bar{p} \to Z + X) \times B(Z \to e e)$ and their ratio

D0

Collaboration

•

B. Abbott
(
- New York U.
)

et al.

- Phys.Rev.D 61 (2000) 072001
•
e-Print:
- hep-ex/9906025
•
DOI:
- 10.1103/PhysRevD.61.072001

[5]

Reformulation of a likelihood approach to fake-lepton estimation in the framework of Bayesian inference

et al.

- Nucl.Instrum.Meth.A 1021 (2022) 165939
•
e-Print:
- 2106.13628
•
DOI:
- 10.1016/j.nima.2021.165939

[6]

Improving estimates of the number of 'fake` leptons and other mis-reconstructed objects in hadron collider events: BoB`s your UNCLE

- JHEP 11 (2014) 031
•
e-Print:
- 1407.5624
•
DOI:
- 10.1007/JHEP11(2014)031

[7]

Observation of inclusive electrons in the ATLAS experiment at $\sqrt{s} = 7$ TeV.

ATLAS

Collaboration

[8]

Statistics of weighted Poisson events and its applications

G. Bohm
,
G. Zech

- Nucl.Instrum.Meth.A 748 (2014) 1-6
•
e-Print:
- 1309.1287
•
DOI:
- 10.1016/j.nima.2014.02.021

[9]

Minuit: A System for Function Minimization and Analysis of the Parameter Errors and Correlations

F. James
(
- CERN
)
,
M. Roos
(
- CERN
)

- Comput.Phys.Commun. 10 (1975) 343-367
•
DOI:
- 10.1016/0010-4655(75)90039-9

[10]

ROOT: An object oriented data analysis framework

R. Brun
(
- CERN
)
,
F. Rademakers
(
- NIKHEF, Amsterdam and
- Hewlett-Packard, Geneva
)

- Nucl.Instrum.Meth.A 389 (1997) 81-86
•
DOI:
- 10.1016/S0168-9002(97)00048-X

[11]

ATLAS

ATLAS collaboration

Collaboration

•

Insertable B-Layer Technical

for the collaboration.

[12]

Production and Integration of the ATLAS Insertable B-Layer

ATLAS IBL

Collaboration

•

B. Abbott
(
- Oklahoma U.
)

et al.

- JINST 13 (2018) 05, T05008
•
e-Print:
- 1803.00844
•
DOI:
- 10.1088/1748-0221/13/05/T05008

[13]

Performance of the ATLAS Trigger System in 2015

ATLAS

Collaboration

•

Morad Aaboud
(
- Oujda U.
)

et al.

- Eur.Phys.J.C 77 (2017) 5, 317
•
e-Print:
- 1611.09661
•
DOI:
- 10.1140/epjc/s10052-017-4852-3

[14]

The ATLAS Collaboration Software and Firmware

ATLAS

Collaboration

[15]

Performance of the ATLAS muon triggers in Run 2

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- JINST 15 (2020) 09, P09015
•
e-Print:
- 2004.13447
•
DOI:
- 10.1088/1748-0221/15/09/p09015

[16]

Performance of electron and photon triggers in ATLAS during LHC Run 2

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 80 (2020) 1, 47
•
e-Print:
- 1909.00761
•
DOI:
- 10.1140/epjc/s10052-019-7500-2

[17]

Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 74 (2014) 10, 3071
•
e-Print:
- 1407.5063
•
DOI:
- 10.1140/epjc/s10052-014-3071-4

[18]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[19]

FastJet User Manual

Matteo Cacciari
(
- Paris, LPTHE and
- Diderot U., Paris
)
,
Gavin P. Salam
(
- CERN and
- Princeton U. and
- Paris, LPTHE
)
,
Gregory Soyez
(
- Saclay, SPhT
)

- Eur.Phys.J.C 72 (2012) 1896
•
e-Print:
- 1111.6097
•
DOI:
- 10.1140/epjc/s10052-012-1896-2

[20]

Pileup subtraction using jet areas

Matteo Cacciari
(
- Paris, LPTHE
)
,
Gavin P. Salam
(
- Paris, LPTHE
)

- Phys.Lett.B 659 (2008) 119-126
•
e-Print:
- 0707.1378
•
DOI:
- 10.1016/j.physletb.2007.09.077

[21]

Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

ATLAS

Collaboration

•

Morad Aaboud
(
- Oujda U.
)

et al.

- Phys.Rev.D 97 (2018) 7, 072003
•
e-Print:
- 1712.08891
•
DOI:
- 10.1103/PhysRevD.97.072003

[22]

Search for chargino–neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s} = 13$ TeV pp collisions with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Marseille, CPPM
)

et al.

- Eur.Phys.J.C 81 (2021) 12, 1118,
- Eur.Phys.J.C 81 (2021) 1118
•
e-Print:
- 2106.01676
•
DOI:
- 10.1140/epjc/s10052-021-09749-7

[23]

Improvements in $t\bar{t}$ modelling using NLO+PS Monte Carlo generators for Run2

ATLAS

Collaboration

[24]

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX

Simone Alioli
(
- DESY, Zeuthen and
- INFN, Milan Bicocca
)
,
Paolo Nason
(
- INFN, Milan Bicocca
)
,
Carlo Oleari
(
- Milan Bicocca U. and
- INFN, Milan Bicocca
)
,
Emanuele Re
(
- Durham U., IPPP and
- INFN, Milan Bicocca
)

- JHEP 06 (2010) 043
•
e-Print:
- 1002.2581
•
DOI:
- 10.1007/JHEP06(2010)043

[25]

An introduction to PYTHIA 8.2

et al.

- Comput.Phys.Commun. 191 (2015) 159-177
•
e-Print:
- 1410.3012
•
DOI:
- 10.1016/j.cpc.2015.01.024

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