# Precision top physics and entanglement with the ATLAS experiment

- Institution: CERN
- Department: LHC Seminar
- Speaker: Baptiste Ravina
- Year: 2023
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3015832)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

With more than a hundred million pairs of top quarks, the LHC is a top quark factory. Three recent ATLAS measurements that exemplify the unprecedented experimental precision and new, novel analysis methods to reduce uncertainties are presented. This seminar will discuss the ATLAS+CMS combination of top quark mass measurements using the Run 1 of the LHC, resulting in the most precise experimental result to date of this parameter, and that of the measurement of the production of top quark pairs in association with a Z boson, resulting in a precision measurement of the top-Z coupling. Finally, the first observation of quantum entanglement in quarks, as measured with top-quark pairs, and at high energies will be presented. Together, these results highlight the breadth of the top-quark research program at the LHC.

Refreshments will be served at 10:30 .

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## Lectures

1. [Precision top physics and entanglement with the ATLAS experiment](https://invisiblenetwork.ai/learn/cern/3015832/e22ddd805600), 1 h 11 min (CERN's player)