Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework

Ghezzi, Margherita; Jäger, Barbara; Lopez Portillo Chavez, Santiago; Reina, Laura; Wackeroth, Doreen

doi:10.1103/PhysRevD.106.014001

Title: Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework

Abstract

We present an implementation of $$t\bar{t}$$ $$\ell$$^⁺$$\ell$$^⁻($$\ell$$ = $$\textit{e}$$, $$\mu$$) hadronic production at next-to-leading order in QCD matched to parton-shower event generators in the POWHEG BOX framework. The program we developed includes all leading-order contributions of order $$\textit{a}$$$$^{2}_{s}$$$$\textit{a}$$$$^2$ for the specified final state, as well as the corresponding first-order QCD corrections. Decays of the top quarks have been simulated retaining spin-correlations in all tree-level matrix elements. We consider the case of the Large Hadron Collider at $$\sqrt s$$ =13 TeV and compare results for $$t\bar{t}$$ $$\ell$$^⁺$$\ell$$^⁻ production in the fiducial volume where the invariant mass of the lepton pairs is centered around the Z-boson mass to corresponding predictions for $$t\bar{t}$$Z on-shell production with Z → $$\ell$$^⁺$$\ell$$^⁻. We find that off-shell effects in $$t\bar{t}$$$$\ell$$^⁺$$\ell$$^⁻ are in general small at the level of the total cross section, but can decrease the tail of the leptons’ transverse momentum distributions by 10%–20% and, in these regions, they are visible beyond the scale uncertainty due to renormalization and factorization scale variation. Moreover, we find that accounting for top-quark decays in the narrow-width approximation with tree-level spin correlations also gives origin to 10%-20% effects in specific regions of the kinematic distributions of the $$t\bar{t}$$$$\ell$$^⁺$$\ell$$^⁻ decayed final state.

Authors:

;

Publication Date:: Fri Jul 01 00:00:00 EDT 2022

Research Org.:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Org.:: National Science Foundation (NSF); German Research Foundation (DFG); USDOE Office of Science (SC)

OSTI Identifier:: 1874614

Alternate Identifier(s):: OSTI ID: 1980135

Grant/Contract Number:: SC0010102; PHY-1719690; PHY-2014021; INST 39/963-1 FUGG

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 106 Journal Issue: 1; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-hadron interactions; Particle phenomena; Particle interations; Particle production; Perturbative QCD; Strong interaction; Quark & gluon jets; Quarks; Top quark; Monte Carlo methods; Astronomy & Astrophysics; Physics

Citation Formats


                    Ghezzi, Margherita, Jäger, Barbara, Lopez Portillo Chavez, Santiago, Reina, Laura, and Wackeroth, Doreen. Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework.  United States: N. p., 2022. 
Web.  doi:10.1103/PhysRevD.106.014001.

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                    Ghezzi, Margherita, Jäger, Barbara, Lopez Portillo Chavez, Santiago, Reina, Laura, & Wackeroth, Doreen. Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework.  United States.  https://doi.org/10.1103/PhysRevD.106.014001

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                    Ghezzi, Margherita, Jäger, Barbara, Lopez Portillo Chavez, Santiago, Reina, Laura, and Wackeroth, Doreen. Fri .  
"Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework".  United States.  https://doi.org/10.1103/PhysRevD.106.014001.

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@article{osti_1874614,

  title        = {Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework},

  author       = {Ghezzi, Margherita and Jäger, Barbara and Lopez Portillo Chavez, Santiago and Reina, Laura and Wackeroth, Doreen},

  abstractNote = {We present an implementation of $t\bar{t}$ $\ell$⁺$\ell$⁻($\ell$ = $\textit{e}$, $\mu$) hadronic production at next-to-leading order in QCD matched to parton-shower event generators in the POWHEG BOX framework. The program we developed includes all leading-order contributions of order $\textit{a}$$^{2}_{s}$$\textit{a}$$^2$ for the specified final state, as well as the corresponding first-order QCD corrections. Decays of the top quarks have been simulated retaining spin-correlations in all tree-level matrix elements. We consider the case of the Large Hadron Collider at $\sqrt s$ =13 TeV and compare results for $t\bar{t}$ $\ell$⁺$\ell$⁻ production in the fiducial volume where the invariant mass of the lepton pairs is centered around the Z-boson mass to corresponding predictions for $t\bar{t}$Z on-shell production with Z → $\ell$⁺$\ell$⁻. We find that off-shell effects in $t\bar{t}$$\ell$⁺$\ell$⁻ are in general small at the level of the total cross section, but can decrease the tail of the leptons’ transverse momentum distributions by 10%–20% and, in these regions, they are visible beyond the scale uncertainty due to renormalization and factorization scale variation. Moreover, we find that accounting for top-quark decays in the narrow-width approximation with tree-level spin correlations also gives origin to 10%-20% effects in specific regions of the kinematic distributions of the $t\bar{t}$$\ell$⁺$\ell$⁻ decayed final state.},

  doi          = {10.1103/PhysRevD.106.014001},

  journal      = {Physical Review D},

  number       = 1,

  volume       = 106,

  place        = {United States},

  year         = {Fri Jul 01 00:00:00 EDT 2022},

  month        = {Fri Jul 01 00:00:00 EDT 2022}

}

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Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at $$\sqrt{s} = 13$$ TeV with the ATLAS detector
journal, August 2021

Aad, G.; Abbott, B.; Abbott, D. C.
The European Physical Journal C, Vol. 81, Issue 8
DOI: 10.1140/epjc/s10052-021-09439-4

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journal, July 2021

Bevilacqua, Giuseppe; Bi, Huan-Yu; Hartanto, Heribertus Bayu
The European Physical Journal C, Vol. 81, Issue 7
DOI: 10.1140/epjc/s10052-021-09478-x

Matching NLO QCD computations and parton shower simulations
journal, June 2002

Frixione, Stefano; Webber, Bryan R.
Journal of High Energy Physics, Vol. 2002, Issue 06
DOI: 10.1088/1126-6708/2002/06/029

LHAPDF6: parton density access in the LHC precision era
journal, March 2015

Buckley, Andy; Ferrando, James; Lloyd, Stephen
The European Physical Journal C, Vol. 75, Issue 3
DOI: 10.1140/epjc/s10052-015-3318-8

Subleading EW corrections and spin-correlation effects in $$t\bar{t}W$$ multi-lepton signatures
journal, September 2020

Frederix, Rikkert; Tsinikos, Ioannis
The European Physical Journal C, Vol. 80, Issue 9
DOI: 10.1140/epjc/s10052-020-8388-6

Associated top quark pair production with a heavy boson: differential cross sections at NLO + NNLL accuracy
journal, May 2020

Kulesza, Anna; Motyka, Leszek; Schwartländer, Daniel
The European Physical Journal C, Vol. 80, Issue 5
DOI: 10.1140/epjc/s10052-020-7987-6

Combined NLO EW and QCD corrections to off-shell $$\text {t} \overline{\text {t}}\text {W} $$ production at the LHC
journal, April 2021

Denner, Ansgar; Pelliccioli, Giovanni
The European Physical Journal C, Vol. 81, Issue 4
DOI: 10.1140/epjc/s10052-021-09143-3

Hadronic top-quark pair-production with one jet and parton showering
journal, January 2012

Alioli, Simone; Moch, Sven-Olaf; Uwer, Peter
Journal of High Energy Physics, Vol. 2012, Issue 1
DOI: 10.1007/JHEP01(2012)137

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
journal, June 2010

Alioli, Simone; Nason, Paolo; Oleari, Carlo
Journal of High Energy Physics, Vol. 2010, Issue 6
DOI: 10.1007/JHEP06(2010)043

Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons
journal, June 2015

Frixione, S.; Hirschi, V.; Pagani, D.
Journal of High Energy Physics, Vol. 2015, Issue 6
DOI: 10.1007/JHEP06(2015)184

Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW
journal, July 2018

Czakon, Michał; Heymes, David; Mitov, Alexander
Physical Review D, Vol. 98, Issue 1
DOI: 10.1103/PhysRevD.98.014003

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

Alwall, J.; Frederix, R.; Frixione, S.
Journal of High Energy Physics, Vol. 2014, Issue 7
DOI: 10.1007/JHEP07(2014)079

On improving NLO merging for $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production
journal, November 2021

Frederix, Rikkert; Tsinikos, Ioannis
Journal of High Energy Physics, Vol. 2021, Issue 11
DOI: 10.1007/JHEP11(2021)029

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journal, August 2008

Lazopoulos, Achilleas; McElmurry, Thomas; Melnikov, Kirill
Physics Letters B, Vol. 666, Issue 1
DOI: 10.1016/j.physletb.2008.06.073

Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
journal, March 2019

Kulesza, Anna; Motyka, Leszek; Schwartländer, Daniel
The European Physical Journal C, Vol. 79, Issue 3
DOI: 10.1140/epjc/s10052-019-6746-z

A standard format for Les Houches Event Files
journal, February 2007

Alwall, J.; Ballestrero, A.; Bartalini, P.
Computer Physics Communications, Vol. 176, Issue 4
DOI: 10.1016/j.cpc.2006.11.010

$Z^{0}$ -boson production in association with a $t \bar{t}$ pair at next-to-leading order accuracy with parton shower effects
journal, April 2012

Garzelli, M. V.; Kardos, A.; Papadopoulos, C. G.
Physical Review D, Vol. 85, Issue 7
DOI: 10.1103/PhysRevD.85.074022

Predictions for all processes e+e− → fermions + γ
journal, November 1999

Denner, A.; Dittmaier, S.; Roth, M.
Nuclear Physics B, Vol. 560, Issue 1-3
DOI: 10.1016/S0550-3213(99)00437-X

Updates to the one-loop provider NLOX
journal, January 2022

Figueroa, Diogenes; Quackenbush, Seth; Reina, Laura
Computer Physics Communications, Vol. 270
DOI: 10.1016/j.cpc.2021.108150

Higgs boson production in association with $b$ jets in the powheg box
journal, January 2016

Jäger, B.; Reina, L.; Wackeroth, D.
Physical Review D, Vol. 93, Issue 1
DOI: 10.1103/PhysRevD.93.014030

Higgs boson production in association with top quarks in the POWHEG BOX
journal, May 2015

Hartanto, H. B.; Jäger, B.; Reina, L.
Physical Review D, Vol. 91, Issue 9
DOI: 10.1103/PhysRevD.91.094003

Associated production of a top pair and a Z boson at the LHC to NNLL accuracy
journal, April 2017

Broggio, Alessandro; Ferroglia, Andrea; Ossola, Giovanni
Journal of High Energy Physics, Vol. 2017, Issue 4
DOI: 10.1007/JHEP04(2017)105

Measurement of the $${\varvec{t\bar{t}Z}}$$ t t ¯ Z and $${\varvec{t\bar{t}W}}$$ t t ¯ W production cross sections in multilepton final states using 3.2 fb $$^{-1}$$ - 1 of $$\varvec{pp}$$ p p collisions at $$\sqrt{s}$$ s = 13 TeV with the ATLAS detector
journal, January 2017

Aaboud, M.; Aad, G.; Abbott, B.
The European Physical Journal C, Vol. 77, Issue 1
DOI: 10.1140/epjc/s10052-016-4574-y

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, August 2018

Sirunyan, A. M.; Tumasyan, A.; Adam, W.
Journal of High Energy Physics, Vol. 2018, Issue 8
DOI: 10.1007/JHEP08(2018)011

Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007

Frixione, Stefano; Nason, Paolo; Oleari, Carlo
Journal of High Energy Physics, Vol. 2007, Issue 11
DOI: 10.1088/1126-6708/2007/11/070

Tuning PYTHIA 8.1: the Monash 2013 tune
journal, August 2014

Skands, P.; Carrazza, S.; Rojo, J.
The European Physical Journal C, Vol. 74, Issue 8
DOI: 10.1140/epjc/s10052-014-3024-y

Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations
journal, April 2007

Frixione, Stefano; Laenen, Eric; Motylinski, Patrick
Journal of High Energy Physics, Vol. 2007, Issue 04
DOI: 10.1088/1126-6708/2007/04/081

The impact of top-quark modelling on the exclusion limits in $$\varvec{t{\bar{t}}}+\text {DM}$$ searches at the LHC
journal, November 2021

Hermann, J.; Worek, M.
The European Physical Journal C, Vol. 81, Issue 11
DOI: 10.1140/epjc/s10052-021-09831-0

MadGraph/MadEvent v4: the new web generation
journal, September 2007

Alwall, Johan; Demin, Pavel; Visscher, Simon de
Journal of High Energy Physics, Vol. 2007, Issue 09
DOI: 10.1088/1126-6708/2007/09/028

t $ \bar{\mathrm{t}} $ W± + t $ \bar{\mathrm{t}} $ Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
journal, November 2012

Garzelli, M. V.; Kardos, A.; Papadopoulos, C. G.
Journal of High Energy Physics, Vol. 2012, Issue 11
DOI: 10.1007/JHEP11(2012)056

Review of Particle Physics
journal, August 2020

Zyla, P. A.; Barnett, R. M.; Beringer, J.
Progress of Theoretical and Experimental Physics, Vol. 2020, Issue 8
DOI: 10.1093/ptep/ptaa104

Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy
journal, September 2016

Broggio, Alessandro; Ferroglia, Andrea; Ossola, Giovanni
Journal of High Energy Physics, Vol. 2016, Issue 9
DOI: 10.1007/JHEP09(2016)089

Electroweak corrections to charged-current fermion processes: Technical details and further results
journal, September 2005

Denner, A.; Dittmaier, S.; Roth, M.
Nuclear Physics B, Vol. 724, Issue 1-2
DOI: 10.1016/j.nuclphysb.2005.06.033

Large NLO corrections in t t ¯ W ± $$ t\overline{t}{W}^{\pm } $$ and t t ¯ t t ¯ $$ t\overline{t}t\overline{t} $$ hadroproduction from supposedly subleading EW contributions
journal, February 2018

Frederix, Rikkert; Pagani, Davide; Zaro, Marco
Journal of High Energy Physics, Vol. 2018, Issue 2
DOI: 10.1007/JHEP02(2018)031

A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004

Nason, Paolo
Journal of High Energy Physics, Vol. 2004, Issue 11
DOI: 10.1088/1126-6708/2004/11/040

NLOX, a one-loop provider for Standard Model processes
journal, December 2020

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DOI: 10.1016/j.cpc.2020.107284

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DOI: 10.1007/JHEP08(2019)039

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journal, May 2021

Cordero, F. Febres; Kraus, M.; Reina, L.
Physical Review D, Vol. 103, Issue 9
DOI: 10.1103/PhysRevD.103.094014

Modeling uncertainties of $t \bar{t} W^{\pm}$ multilepton signatures
journal, January 2022

Bevilacqua, G.; Bi, H. Y.; Febres Cordero, F.
Physical Review D, Vol. 105, Issue 1
DOI: 10.1103/PhysRevD.105.014018

Anatomy of inclusive $t \overline{t} W$ production at hadron colliders
journal, December 2020

von Buddenbrock, Stefan; Ruiz, Richard; Mellado, Bruce
Physics Letters B, Vol. 811
DOI: 10.1016/j.physletb.2020.135964

Constraining couplings of top quarks to the Z boson in t t ¯ $$ t\overline{t} $$ + Z production at the LHC
journal, July 2014

Röntsch, Raoul; Schulze, Markus
Journal of High Energy Physics, Vol. 2014, Issue 7
DOI: 10.1007/JHEP07(2014)091

New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
journal, January 2021

Hou, Tie-Jiun; Gao, Jun; Hobbs, T. J.
Physical Review D, Vol. 103, Issue 1
DOI: 10.1103/PhysRevD.103.014013

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journal, November 2014

Li, Hai Tao; Li, Chong Sheng; Li, Shi Ang
Physical Review D, Vol. 90, Issue 9
DOI: 10.1103/PhysRevD.90.094009

Three-jet cross sections to next-to-leading order
journal, May 1996

Frixione, S.; Kunszt, Z.; Signer, A.
Nuclear Physics B, Vol. 467, Issue 3
DOI: 10.1016/0550-3213(96)00110-1

Matching NLO QCD and parton showers in heavy flavour production
journal, August 2003

Frixione, Stefano; Nason, Paolo; Webber, Bryan R.
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DOI: 10.1088/1126-6708/2003/08/007

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journal, June 2015

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DOI: 10.1016/j.cpc.2015.01.024

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DOI: 10.1007/JHEP11(2020)069

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journal, March 2012

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DOI: 10.1103/PhysRevD.85.054015

Top-quark charge asymmetry and polarization in $t \bar{t} W^{\pm}$ production at the LHC
journal, September 2014

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Physics Letters B, Vol. 736
DOI: 10.1016/j.physletb.2014.07.033

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DOI: 10.1007/JHEP02(2016)113

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journal, April 2019

Aaboud, M.; Aad, G.; Abbott, B.
Physical Review D, Vol. 99, Issue 7
DOI: 10.1103/PhysRevD.99.072009

Towards constraining dark matter at the LHC: higher order QCD predictions for t$$ \overline{t} $$ + Z (Z → νℓ$$ \overline{v} $$ℓ)
journal, November 2019

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journal, July 2012

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DOI: 10.1007/JHEP07(2012)052

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Title: Hadronic production of top-quark pairs in association with a pair of leptons in the powheg box framework

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Updates to the one-loop provider NLOX journal, January 2022

Higgs boson production in association with b jets in the powheg box journal, January 2016

Higgs boson production in association with top quarks in the POWHEG BOX journal, May 2015

Associated production of a top pair and a Z boson at the LHC to NNLL accuracy journal, April 2017

Measurement of the $${\varvec{t\bar{t}Z}}$$ t t ¯ Z and $${\varvec{t\bar{t}W}}$$ t t ¯ W production cross sections in multilepton final states using 3.2 fb $$^{-1}$$ - 1 of $$\varvec{pp}$$ p p collisions at $$\sqrt{s}$$ s = 13 TeV with the ATLAS detector journal, January 2017

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal, August 2018

Matching NLO QCD computations with parton shower simulations: the POWHEG method journal, November 2007

Tuning PYTHIA 8.1: the Monash 2013 tune journal, August 2014

Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations journal, April 2007

The impact of top-quark modelling on the exclusion limits in $$\varvec{t{\bar{t}}}+\text {DM}$$ searches at the LHC journal, November 2021

MadGraph/MadEvent v4: the new web generation journal, September 2007

t $ \bar{\mathrm{t}} $ W± + t $ \bar{\mathrm{t}} $ Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects journal, November 2012

Review of Particle Physics journal, August 2020

Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy journal, September 2016

Electroweak corrections to charged-current fermion processes: Technical details and further results journal, September 2005

Large NLO corrections in t t ¯ W ± $$ t\overline{t}{W}^{\pm } $$ and t t ¯ t t ¯ $$ t\overline{t}t\overline{t} $$ hadroproduction from supposedly subleading EW contributions journal, February 2018

A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms journal, November 2004

NLOX, a one-loop provider for Standard Model processes journal, December 2020

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections journal, August 2019

Top-quark pair production in association with a W ± gauge boson in the POWHEG-BOX journal, May 2021

Modeling uncertainties of t t ¯ W ± multilepton signatures journal, January 2022

Anatomy of inclusive t t ‾ W production at hadron colliders journal, December 2020

Constraining couplings of top quarks to the Z boson in t t ¯ $$ t\overline{t} $$ + Z production at the LHC journal, July 2014

New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC journal, January 2021

Renormalization group improved predictions for t t ¯ W ± production at hadron colliders journal, November 2014

Three-jet cross sections to next-to-leading order journal, May 1996

Matching NLO QCD and parton showers in heavy flavour production journal, August 2003

An introduction to PYTHIA 8.2 journal, June 2015

NLO QCD corrections to off-shell $$ \mathrm{t}\overline{\mathrm{t}}{\mathrm{W}}^{\pm } $$ production at the LHC journal, November 2020

Top quark pair production in association with a Z -boson at next-to-leading-order accuracy journal, March 2012

Top-quark charge asymmetry and polarization in t t ¯ W ± production at the LHC journal, September 2014

Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on t t ¯ H $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{H} $$ searches at the LHC journal, February 2016

Measurement of the t t ¯ Z and t t ¯ W cross sections in proton-proton collisions at s = 13 TeV with the ATLAS detector journal, April 2019

Towards constraining dark matter at the LHC: higher order QCD predictions for t$$ \overline{t} $$ + Z (Z → νℓ$$ \overline{v} $$ℓ) journal, November 2019

$$ t\overline t {W^{\pm }} $$ production and decay at NLO journal, July 2012

The simplest of them all: $$ t\overline{t}{W}^{\pm } $$ at NLO accuracy in QCD journal, August 2020

Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at $$\sqrt{s} = 13$$ TeV with the ATLAS detector
journal, August 2021

NLO QCD corrections to off-shell $${t{\bar{t}}W^\pm }$$ production at the LHC: correlations and asymmetries
journal, July 2021

Matching NLO QCD computations and parton shower simulations
journal, June 2002

LHAPDF6: parton density access in the LHC precision era
journal, March 2015

Subleading EW corrections and spin-correlation effects in $$t\bar{t}W$$ multi-lepton signatures
journal, September 2020

Associated top quark pair production with a heavy boson: differential cross sections at NLO + NNLL accuracy
journal, May 2020

Combined NLO EW and QCD corrections to off-shell $$\text {t} \overline{\text {t}}\text {W} $$ production at the LHC
journal, April 2021

Hadronic top-quark pair-production with one jet and parton showering
journal, January 2012

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
journal, June 2010

Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons
journal, June 2015

Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW
journal, July 2018

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

On improving NLO merging for $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{W} $$ production
journal, November 2021

Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
journal, March 2019

A standard format for Les Houches Event Files
journal, February 2007

$Z^{0}$ -boson production in association with a $t \bar{t}$ pair at next-to-leading order accuracy with parton shower effects
journal, April 2012

Predictions for all processes e+e− → fermions + γ
journal, November 1999

Updates to the one-loop provider NLOX
journal, January 2022

Higgs boson production in association with $b$ jets in the powheg box
journal, January 2016

Higgs boson production in association with top quarks in the POWHEG BOX
journal, May 2015

Associated production of a top pair and a Z boson at the LHC to NNLL accuracy
journal, April 2017

Measurement of the $${\varvec{t\bar{t}Z}}$$ t t ¯ Z and $${\varvec{t\bar{t}W}}$$ t t ¯ W production cross sections in multilepton final states using 3.2 fb $$^{-1}$$ - 1 of $$\varvec{pp}$$ p p collisions at $$\sqrt{s}$$ s = 13 TeV with the ATLAS detector
journal, January 2017

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, August 2018

Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007

Tuning PYTHIA 8.1: the Monash 2013 tune
journal, August 2014

Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations
journal, April 2007

The impact of top-quark modelling on the exclusion limits in $$\varvec{t{\bar{t}}}+\text {DM}$$ searches at the LHC
journal, November 2021

MadGraph/MadEvent v4: the new web generation
journal, September 2007

t $ \bar{\mathrm{t}} $ W± + t $ \bar{\mathrm{t}} $ Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
journal, November 2012

Review of Particle Physics
journal, August 2020

Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy
journal, September 2016

Electroweak corrections to charged-current fermion processes: Technical details and further results
journal, September 2005

Large NLO corrections in t t ¯ W ± $$ t\overline{t}{W}^{\pm } $$ and t t ¯ t t ¯ $$ t\overline{t}t\overline{t} $$ hadroproduction from supposedly subleading EW contributions
journal, February 2018

A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004

NLOX, a one-loop provider for Standard Model processes
journal, December 2020

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections
journal, August 2019

Top-quark pair production in association with a $W^{\pm}$ gauge boson in the POWHEG-BOX
journal, May 2021

Modeling uncertainties of $t \bar{t} W^{\pm}$ multilepton signatures
journal, January 2022

Anatomy of inclusive $t \overline{t} W$ production at hadron colliders
journal, December 2020

Constraining couplings of top quarks to the Z boson in t t ¯ $$ t\overline{t} $$ + Z production at the LHC
journal, July 2014

New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
journal, January 2021

Renormalization group improved predictions for $t \bar{t} W^{\pm}$ production at hadron colliders
journal, November 2014

Three-jet cross sections to next-to-leading order
journal, May 1996

Matching NLO QCD and parton showers in heavy flavour production
journal, August 2003

An introduction to PYTHIA 8.2
journal, June 2015

NLO QCD corrections to off-shell $$ \mathrm{t}\overline{\mathrm{t}}{\mathrm{W}}^{\pm } $$ production at the LHC
journal, November 2020

Top quark pair production in association with a $Z$ -boson at next-to-leading-order accuracy
journal, March 2012

Top-quark charge asymmetry and polarization in $t \bar{t} W^{\pm}$ production at the LHC
journal, September 2014

Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on t t ¯ H $$ \mathrm{t}\overline{\mathrm{t}}\mathrm{H} $$ searches at the LHC
journal, February 2016

Measurement of the $t \bar{t} Z$ and $t \bar{t} W$ cross sections in proton-proton collisions at $\sqrt{s} = 13 TeV$ with the ATLAS detector
journal, April 2019

Towards constraining dark matter at the LHC: higher order QCD predictions for t$$ \overline{t} $$ + Z (Z → νℓ$$ \overline{v} $$ℓ)
journal, November 2019

$$ t\overline t {W^{\pm }} $$ production and decay at NLO
journal, July 2012

The simplest of them all: $$ t\overline{t}{W}^{\pm } $$ at NLO accuracy in QCD
journal, August 2020