Search for top-philic heavy resonances in pp collisions at √s = 13 TeV with the ATLAS detector$with the ATLAS detector
A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a t ¯t pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at √s = 13 TeV at the Large Hadron Collider during the years 2015–2018, corre...
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
15 February 2024
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| In: |
The European physical journal. C, Particles and fields
Year: 2024, Volume: 84, Issue: 2, Pages: 1-32 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-023-12318-9 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-023-12318-9 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1140/epjc/s10052-023-12318-9 
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| Author Notes: | ATLAS Collaboration |
| Summary: | A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a t ¯t pair is presented. The search uses the data recorded by the ATLAS detector in pp collisions at √s = 13 TeV at the Large Hadron Collider during the years 2015–2018, corresponding to an integrated luminosity of 139 fb−1 . Events containing exactly one electron or muon are selected. The two hadronically decaying top quarks from the resonance decay are reconstructed using jets clustered with a large radius parameter of R = 1. The invariant mass spectrum of the two top quark candidates is used to search for a resonance signal in the range of 1.0 TeV to 3.2 TeV. The presence of a signal is examined using an approach with minimal model dependence followed by a model-dependent interpretation. No significant excess is observed over the background expectation. Upper limits on the production cross section times branching ratio at 95% confidence level are provided for a heavy Z ′ boson based on a simplified model, for Z ′ mass between 1.0 TeV and 3.0 TeV. The observed (expected) limits range from 21 (14) fb to 119 (86) fb depending on the choice of model parameters. |
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| Item Description: | The ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, D.F. Rassloff, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, M. Wessels, J. Zinsser [und 2901 weitere] Gesehen am 07.02.2025 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-023-12318-9 |