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Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector. / The ATLAS collaboration.
In: European Physical Journal C: Particles and Fields, Vol. 85, No. 5, 561, 22.05.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

The ATLAS collaboration 2025, 'Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector', European Physical Journal C: Particles and Fields, vol. 85, no. 5, 561. https://doi.org/10.1140/epjc/s10052-025-14075-3

APA

The ATLAS collaboration (2025). Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector. European Physical Journal C: Particles and Fields, 85(5), Article 561. https://doi.org/10.1140/epjc/s10052-025-14075-3

Vancouver

The ATLAS collaboration. Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector. European Physical Journal C: Particles and Fields. 2025 May 22;85(5):561. doi: 10.1140/epjc/s10052-025-14075-3

Author

The ATLAS collaboration. / Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector. In: European Physical Journal C: Particles and Fields. 2025 ; Vol. 85, No. 5.

Bibtex

@article{53e473bfa1944fa99ef6d74dca83be20,
title = "Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector",
abstract = "This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $$\tau $$ {\"I}„ -lepton pair with low transverse momentum. When two $$\tau $$ {\"I}„ -leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the $$\tau $$ {\"I}„ -leptons. A dedicated treatment attempting to tag the $$\tau $$ {\"I}„ -lepton pair as a single object is required. The reconstruction algorithm is based on a large radius jet and its associated two leading subjets, and the identification uses a boosted decision tree to discriminate between signatures from $$\tau ^+\tau ^-$$ {\"I}„ + {\"I}„ - systems and those arising from QCD jets. The efficiency of the identification algorithm is measured in $$Z\gamma $$ Z {\^I}³ events using proton{\^a}€“proton collision data at $$\sqrt{s}=13$$ s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of $$139\,\text{ fb}^{-1}$$ 139 fb - 1 . The resulting data-to-simulation scale factors are close to unity with uncertainties ranging from 26 to 37%.",
author = "{The ATLAS collaboration} and Hanadi Ali and Zainab Alsolami and A.E. Barton and G. Borissov and E.V. Bouhova-Thacker and Ruby Ferguson and James Ferrando and H. Fox and Alina Hagan and R.C.W. Henderson and R.W.L. Jones and V. Kartvelishvili and P.A. Love and Marshall, {Emma J.} and Luke McElhinney and L. Meng and D. Muenstermann and Elliot Sampson and M. Smizanska and A.M. Wharton",
year = "2025",
month = may,
day = "22",
doi = "10.1140/epjc/s10052-025-14075-3",
language = "English",
volume = "85",
journal = "European Physical Journal C: Particles and Fields",
issn = "1434-6044",
publisher = "SPRINGER",
number = "5",

}

RIS

TY - JOUR

T1 - Reconstruction and identification of pairs of collimated $$\tau $$-leptons decaying hadronically using $$\sqrt{s}=13$$ TeV pp collision data with the ATLAS detector

AU - The ATLAS collaboration

AU - Ali, Hanadi

AU - Alsolami, Zainab

AU - Barton, A.E.

AU - Borissov, G.

AU - Bouhova-Thacker, E.V.

AU - Ferguson, Ruby

AU - Ferrando, James

AU - Fox, H.

AU - Hagan, Alina

AU - Henderson, R.C.W.

AU - Jones, R.W.L.

AU - Kartvelishvili, V.

AU - Love, P.A.

AU - Marshall, Emma J.

AU - McElhinney, Luke

AU - Meng, L.

AU - Muenstermann, D.

AU - Sampson, Elliot

AU - Smizanska, M.

AU - Wharton, A.M.

PY - 2025/5/22

Y1 - 2025/5/22

N2 - This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $$\tau $$ τ -lepton pair with low transverse momentum. When two $$\tau $$ τ -leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the $$\tau $$ τ -leptons. A dedicated treatment attempting to tag the $$\tau $$ τ -lepton pair as a single object is required. The reconstruction algorithm is based on a large radius jet and its associated two leading subjets, and the identification uses a boosted decision tree to discriminate between signatures from $$\tau ^+\tau ^-$$ τ + τ - systems and those arising from QCD jets. The efficiency of the identification algorithm is measured in $$Z\gamma $$ Z γ events using proton–proton collision data at $$\sqrt{s}=13$$ s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of $$139\,\text{ fb}^{-1}$$ 139 fb - 1 . The resulting data-to-simulation scale factors are close to unity with uncertainties ranging from 26 to 37%.

AB - This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $$\tau $$ τ -lepton pair with low transverse momentum. When two $$\tau $$ τ -leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the $$\tau $$ τ -leptons. A dedicated treatment attempting to tag the $$\tau $$ τ -lepton pair as a single object is required. The reconstruction algorithm is based on a large radius jet and its associated two leading subjets, and the identification uses a boosted decision tree to discriminate between signatures from $$\tau ^+\tau ^-$$ τ + τ - systems and those arising from QCD jets. The efficiency of the identification algorithm is measured in $$Z\gamma $$ Z γ events using proton–proton collision data at $$\sqrt{s}=13$$ s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of $$139\,\text{ fb}^{-1}$$ 139 fb - 1 . The resulting data-to-simulation scale factors are close to unity with uncertainties ranging from 26 to 37%.

U2 - 10.1140/epjc/s10052-025-14075-3

DO - 10.1140/epjc/s10052-025-14075-3

M3 - Journal article

VL - 85

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

IS - 5

M1 - 561

ER -