First simultaneous measurement of single and pair production of top quarks in association with a Z boson at the LHC

Collaboration
for the collaboration.
Jan 10, 2025
Contribution to:
e-Print:
Report number:
  • CMS CR-2024/352
Experiments:

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Abstract: (arXiv)
The first simultaneous measurement of single and pair production of top quarks in association with a Z boson (ttZq, ttWZ and ttˉt\bar{t}Z) is presented, including both inclusive and differential cross sections. A multiclass neural network is used to separate the signal and the backgrounds. Compared to previous studies, the simultaneous measurement is less dependent on the signal modeling assumptions and improves the sensitivity to new physics scenarios, as it enables to constrain possible deviations from the standard model across different processes.
Note:
  • Talk at the 17th International Workshop on Top Quark Physics (Top2024), 22-27 September 2024
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