# The dark side of jets: ATLAS Dark Sector studies with jets

- Institution: CERN
- Department: LHC Seminar
- Speaker: Giuliano Gustavino
- Year: 2025
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3023033)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

This seminar will present recent results from the ATLAS Collaboration in searches for non-conventional jet signatures motivated by extensions of the Standard Model that include dark QCD-like dynamics, including one result that uses data from LHC Run 3. The analyses target two distinct topologies: semi-visible jets, which consist of a mixture of visible Standard Model hadrons and invisible dark-sector particles, and emerging jets, characterized by displaced vertices resulting from long-lived dark hadrons decaying back into Standard Model particles. To enhance sensitivity to these non-standard signatures, advanced machine learning techniques, including transformers trained on charged-particle track features, are used to discriminate signal-like jets from QCD backgrounds. A model-independent ``anomaly detection'' search strategy was also implemented to cover a wide range of the dark-sector parameter space. These results represent a significant step in probing the structure of hidden sectors and contribute to the broader effort to uncover the particle nature of dark matter.

Refreshments will be served at 10h30

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## Lectures

1. [The dark side of jets: ATLAS Dark Sector studies with jets](https://invisiblenetwork.ai/learn/cern/3023033/acce90411984), 1 h 11 min (CERN's player)