Improved reconstruction of highly boosted [tau]-lepton pairs in the [tau][tau]→ ([mu][nu] [mu] [nu] [tau])(hadrons+[nu] [tau]) decay channels with the ATLAS detector
This paper presents a new $$\tau $$-lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of $$\tau $$-leptons is produced and one $$\tau $$...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
27 June 2025
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| In: |
The European physical journal. C, Particles and fields
Year: 2025, Jahrgang: 85, Heft: 6, Pages: 1-32 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-025-14012-4 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-025-14012-4
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| Verfasserangaben: | ATLAS Collaboration* |
| Zusammenfassung: | This paper presents a new $$\tau $$-lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of $$\tau $$-leptons is produced and one $$\tau $$-lepton decays into a muon and two neutrinos ($$\tau _\mathrm {\mu }$$), and the other decays into hadrons and one neutrino ($$\tau _\textrm{had}$$). By removing the muon information from the signals used for reconstruction and identification of the $$\tau _\textrm{had}$$candidate in the boosted pair, the efficiency is raised to the level expected for an isolated $$\tau _\textrm{had}$$. The new procedure is validated by selecting a sample of highly boosted $$Z\rightarrow \tau _\mathrm {\mu }\tau _\textrm{had}$$candidates from the data sample of 140 $$\textrm{fb}^{-1}$$of proton-proton collisions at 13 TeV recorded with the ATLAS detector. Good agreement is found between data and simulation predictions in both the $$Z\rightarrow \tau _\mathrm {\mu }\tau _\textrm{had}$$signal region and in a background validation region. The results presented in this paper demonstrate the effectiveness of the $$\tau _\textrm{had}$$reconstruction with muon removal in enhancing the signal sensitivity of the boosted $$\tau _\mathrm {\mu }\tau _\textrm{had}$$channel at the ATLAS detector. |
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| Beschreibung: | Online veröffentlicht: 27. Juni 2025 *ATLAS Collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, S. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, D.F. Rassloff, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, L. Vigani, M. Wessels, J. Zinsser [und sehr viele weitere Personen] Gesehen am 08.01.2026 Im Titel ist das zweite [mu] sowie das vierte und fünfte [tau] tiefgestellt |
| Beschreibung: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-025-14012-4 |