Performance of the ATLAS muon trigger in pp collisions at = 8 TeV

20th International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

Woudstra, M.J.^1

University of Manchester, Oxford Road, Manchester

M13 9PL, United Kingdom^1

关键词: ATLAS experiment;    Centre-of-mass energies;    High energy proton;    Level-1 triggers;    Muon trigger;    Physics analysis;    Pp collisions;    Trigger architecture;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/1/012040/pdf
DOI  :  10.1088/1742-6596/513/1/012040

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Given the harsh detector environment produced by collisions of high energy protons at the LHC, events with muons in the final state are an important signature for many physics analyses. The ATLAS experiment employs a multi-level trigger architecture that selects the events in three sequential steps of increasing complexity and accuracy. The Level 1 trigger is implemented with custom-built hardware to reduce the event rate (in 2012) from 20 MHz to 70 kHz. Then the software-based higher level triggers refine the trigger decisions reducing the output rate down to several 100 Hz. The performance of the muon trigger is presented as determined with pp collision data collected in 2012 at a centre-of-mass energy of 8 TeV.