Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment

Almut Maria Pingel; Jørn Dines Hansen; Jørgen Beck Hansen; Mogens Dam; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Lotte Ansgaard Thomsen; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; James William Monk; Lars Egholm Pedersen; Graig Wiglesworth; G. Aad; Gorm Aske Gram Krohn Galster; B. Abbott; J. Abdallah; O. Abdinov; R. Aben; M. Abolins; O.S. AbouZeid; H. Abramowicz; H. Abreu; R. Abreu

doi:10.1016/j.nuclphysbps.2015.09.179

Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment

Almut Maria Pingel, Jørn Dines Hansen, Jørgen Beck Hansen, Mogens Dam, Stefania Xella, Peter Henrik Hansen, Troels Christian Petersen, Lotte Ansgaard Thomsen, Ask Emil Løvschall-Jensen, Alejandro Alonso Diaz, James William Monk, Lars Egholm Pedersen, Graig Wiglesworth, G. Aad, Gorm Aske Gram Krohn Galster, B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. AbolinsO.S. AbouZeid, H. Abramowicz, H. Abreu, R. Abreu

Experimental Particle Physics

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Abstract

This article gives an overview of the steps taken in ATLAS to identify hadronically decaying tau leptons and to validate the performance. The tau trigger, the reconstruction and identification algorithms, and the energy calibration are described. The performance is tested with Z→ττ events, collected in 2012 at 8 TeV center-of-mass energy of the LHC. Identification efficiencies are determined both in real data and simulation and differences are expressed in terms of correction factors, with uncertainties below 6%. The uncertainty on the energy scale is measured with two independent methods and found to be less than 4%. All algorithms show good stability against a varying number of simultaneous proton-proton collisions.

Original language	English
Journal	Nuclear and Particle Physics Proceedings
Volume	273
Pages (from-to)	1141-1146
ISSN	2405-6014
DOIs	https://doi.org/10.1016/j.nuclphysbps.2015.09.179
Publication status	Published - 1 Apr 2016

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10.1016/j.nuclphysbps.2015.09.179

1-s2.0-S2405601415006689-mainFinal published version, 290 KBLicence: CC BY

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Pingel, A. M., Hansen, J. D., Hansen, J. B., Dam, M., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, G., Aad, G., Galster, G. A. G. K., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., ... Abreu, R. (2016). Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment. Nuclear and Particle Physics Proceedings, 273, 1141-1146. https://doi.org/10.1016/j.nuclphysbps.2015.09.179

Pingel, AM, Hansen, JD , Hansen, JB , Dam, M , Xella, S , Hansen, PH , Petersen, TC, Thomsen, LA, Løvschall-Jensen, AE, Alonso Diaz, A, Monk, JW, Pedersen, LE, Wiglesworth, G, Aad, G, Galster, GAGK, Abbott, B, Abdallah, J, Abdinov, O, Aben, R, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H & Abreu, R 2016, 'Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment', Nuclear and Particle Physics Proceedings, vol. 273, pp. 1141-1146. https://doi.org/10.1016/j.nuclphysbps.2015.09.179

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abstract = "This article gives an overview of the steps taken in ATLAS to identify hadronically decaying tau leptons and to validate the performance. The tau trigger, the reconstruction and identification algorithms, and the energy calibration are described. The performance is tested with Z→ττ events, collected in 2012 at 8 TeV center-of-mass energy of the LHC. Identification efficiencies are determined both in real data and simulation and differences are expressed in terms of correction factors, with uncertainties below 6%. The uncertainty on the energy scale is measured with two independent methods and found to be less than 4%. All algorithms show good stability against a varying number of simultaneous proton-proton collisions.",

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AU - Pingel, Almut Maria

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Dam, Mogens

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Thomsen, Lotte Ansgaard

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Monk, James William

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Aad, G.

AU - Galster, Gorm Aske Gram Krohn

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Aben, R.

AU - Abolins, M.

AU - AbouZeid, O.S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

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N2 - This article gives an overview of the steps taken in ATLAS to identify hadronically decaying tau leptons and to validate the performance. The tau trigger, the reconstruction and identification algorithms, and the energy calibration are described. The performance is tested with Z→ττ events, collected in 2012 at 8 TeV center-of-mass energy of the LHC. Identification efficiencies are determined both in real data and simulation and differences are expressed in terms of correction factors, with uncertainties below 6%. The uncertainty on the energy scale is measured with two independent methods and found to be less than 4%. All algorithms show good stability against a varying number of simultaneous proton-proton collisions.

AB - This article gives an overview of the steps taken in ATLAS to identify hadronically decaying tau leptons and to validate the performance. The tau trigger, the reconstruction and identification algorithms, and the energy calibration are described. The performance is tested with Z→ττ events, collected in 2012 at 8 TeV center-of-mass energy of the LHC. Identification efficiencies are determined both in real data and simulation and differences are expressed in terms of correction factors, with uncertainties below 6%. The uncertainty on the energy scale is measured with two independent methods and found to be less than 4%. All algorithms show good stability against a varying number of simultaneous proton-proton collisions.

U2 - 10.1016/j.nuclphysbps.2015.09.179

DO - 10.1016/j.nuclphysbps.2015.09.179

M3 - Conference article

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VL - 273

SP - 1141

EP - 1146

JO - Nuclear and Particle Physics Proceedings

JF - Nuclear and Particle Physics Proceedings

ER -

Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment

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