The ATLAS trigger menu design for higher luminosities in Run 2

被引:0
|
作者
Berlingen, Javier Montejo [1 ]
机构
[1] CERN, Geneva, Switzerland
关键词
D O I
10.1051/epjconf/201921401031
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
ATLAS utilizes a two-level trigger system in Run-2 to reduce the bunch-crossing rate of 40 MHz to an average recording rate of about 1 kHz. Events are selected based on physics signatures such as presence of energetic leptons, photons, jets or large missing energy. Despite the limited time available for processing collision events, the trigger system is able to exploit topological information as well as multi-variate methods, for example for b-tagging or tau identification. The ATLAS trigger menu specifies which triggers are used during data taking and how much rate a given trigger is allocated. For 2018 data taking, the trigger selections and menus have been improved to handle expected luminosities above 2 x 10(34) cm(-2)s(-1) and to ensure robustness in the presence of multiple interactions per bunch crossing (pile-up).
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