SciPost Submission Page
Measurements of $t\bar{t}$ in association with charm quarks at 13 TeV with the ATLAS experiment
by Knut Zoch
Submission summary
| Authors (as registered SciPost users): | Knut Zoch |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202507_00058v1 (pdf) |
| Date accepted: | Aug. 4, 2025 |
| Date submitted: | July 22, 2025, 4:48 p.m. |
| Submitted by: | Knut Zoch |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 17th International Workshop on Top Quark Physics (TOP2024) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
This talk presents the ATLAS Collaboration's first measurement of the inclusive cross-section for top-quark pair production in association with charm quarks. Using the full Run 2 proton-proton collision data sample at $\sqrt{s}$ = 13 TeV, collected with the ATLAS experiment at the LHC between 2015 and 2018, the measurement selects $t\bar{t}$ events with one or two charged leptons and at least one additional jet in the final state. A custom flavour-tagging algorithm is employed to simultaneously identify $b$-jets and $c$-jets. The fiducial cross-sections for $t\bar{t}+{\geq}2c$ and $t\bar{t}+1c$ production are found to largely agree with predictions from various $t\bar{t}$ simulations, though all underpredict the observed values.
Author comments upon resubmission
In addition, references [3], [5], and [6] have been updated to their final published versions.
List of changes
- Clarified definitions of key terms such as heavy-flavour jets, fake leptons, and signal strength.
- Improved wording and phrasing throughout to enhance clarity and readability.
- Updated references [3], [5], and [6] to their published journal versions.
- Addressed consistency issues in terminology (e.g., phase space, tt+light, inclusive volume).
- Minor formatting and typographical corrections.
Current status:
Editorial decision:
For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)