Projects per year
Abstract
In 2022 and 2023, the Large Hadron Collider producedapproximately two billion hadronic interactions each second frombunches of protons that collide at a rate of 40 MHz. The ATLAStrigger system is used to reduce this rate to a few kHz forrecording. Selections based on hadronic jets, their energy, andevent topology reduce the rate to 𝒪(10) kHz whilemaintaining high efficiencies for important signatures resulting in b-quarks, but to reach the desired recording rate of hundreds ofHz, additional real-time selections based on the identification ofjets containing b-hadrons (b-jets) are employed to achieve lowthresholds on the jet transverse momentum at the High-Level Trigger.The configuration, commissioning, and performance of the real-timeATLAS b-jet identification algorithms for the early LHC Run 3collision data are presented. These recent developments providesubstantial gains in signal efficiency for critical signatures; forthe Standard Model production of Higgs boson pairs, a 50%improvement in selection efficiency is observed in final states withfour b-quarks or two b-quarks and two hadronically decaying τ-leptons.
Original language | English |
---|---|
Article number | P03002 |
Pages (from-to) | 1-44 |
Number of pages | 44 |
Journal | Journal of Instrumentation |
Volume | 20 |
DOIs | |
Publication status | Published - 4 Mar 2025 |
Keywords / Materials (for Non-textual outputs)
- Particle identification methods
- Trigger detectors
Fingerprint
Dive into the research topics of 'Configuration, Performance, and Commissioning of the ATLAS b-jet Triggers for the 2022 and 2023 LHC data-taking periods'. Together they form a unique fingerprint.-
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
-
Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
-
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research