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LHC Seminar

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

by Giuliano Gustavino (Sapienza Universita e INFN, Roma I (IT))

Europe/Zurich
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber

CERN

162
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Description

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

 

Organised by

Tancredi Carli, Jan Fiete Grosse-Oetringhaus and Michelangelo Mangano

Webcast
There is a live webcast for this event