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Search for top-philic heavy resonances in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
A search for the associated production of a heavy resonance with a top-quark or a top-antitop-quark pair, and decaying into a tt ¯ 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.
Item Metadata
| Title |
Search for top-philic heavy resonances in pp collisions at √s = 13 TeV with the ATLAS detector
|
| Creator | |
| Publisher |
Springer Berlin Heidelberg
|
| Date Issued |
2024-02-15
|
| Description |
A search for the associated production of a heavy
resonance with a top-quark or a top-antitop-quark pair, and
decaying into a tt
¯ 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.
|
| Genre | |
| Type | |
| Language |
eng
|
| Date Available |
2024-10-24
|
| Provider |
Vancouver : University of British Columbia Library
|
| Rights |
Attribution 4.0 International (CC BY 4.0)
|
| DOI |
10.14288/1.0447098
|
| URI | |
| Affiliation | |
| Citation |
The European Physical Journal C. 2024 Feb 15;84(2):157
|
| Publisher DOI |
10.1140/epjc/s10052-023-12318-9
|
| Peer Review Status |
Reviewed
|
| Scholarly Level |
Faculty
|
| Copyright Holder |
The Author(s)
|
| Rights URI | |
| Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)