Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

The new ATLAS triggers for long-lived particles that leave unconventional signature in the tracking detectors

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Operation, Performance and Upgrade (Incl. HL-LHC) of Present Detectors Poster Session


Ismet Siral (CERN)


The Large Hadron Collider (LHC) is the world’s highest energy particle accelerator,
providing ultimately unique opportunities of directly searching for new physics Beyond
the Standard Model (BSM). Massive long-lived particles (LLPs), which are absent in
the Standard Model, can occur in many well-motivated theories of physics BSM. These
new massive LLPs can decay into other particles away from the LHC collision point,
resulting in unusual experimental signatures and hence requiring customized and
complex experimental techniques to identify them. Previously, the ATLAS experiment
did not have dedicated triggers to explicitly identify massive LLPs decaying in the inner
tracking detectors using tracking information. To enhance the sensitivity of searches, a
series of new triggers customized for various unconventional tracking signatures, such
as "displaced" tracks and short tracks which "disappear" within the tracking detector,
have been developed and will be utilized in the upcoming Run-3 data taking starting
from 2022. The development of these triggers and their expected performance will be

In-person participation Yes

Primary author

Presentation materials