1331180 20250814162436.0 oai:cds.cern.ch:1331180 cerncds:FULLTEXT cerncds:atlas-pub Inspire 1196749 ATL-DAQ-PUB-2011-001 eng ATL-COM-DAQ-2011-010 Casadei, D NYU The ATLAS collaboration The implementation of the ATLAS missing Et triggers for the initial LHC operation 2011 CERN Geneva 22 Feb 2011 Diego.Casadei@cern.ch Casadei, D mult. p The trigger system of the ATLAS detector is a three-level architecture in which the decision is taken by custom electronics at the first level whereas the following levels operate in a software environment that is similar to the offline reconstruction program. This paper describes the missing transverse energy (\MET) triggers in ATLAS for the first data taking in 2009 and 2010 LHC runs, in particular providing the first public documentation of their implementation at all trigger levels. CC-BY-4.0 Preprint PUB CERN CDS-Invenio WebSubmit Detectors and Experimental Techniques SzGeCERN DAQ and Trigger SzGeCERN CERN INTNOTE PUBLATLAS INTNOTEATLASPUBL CERN LHC ATLAS Aracena, I SLAC Banerjee, S Victoria Beauchemin, P-H Oxford Calvet, S Mainz Cranmer, K NYU Damazio, D BNL Djilkibaev, R NYU Eifert, T Geneve, CERN Hillier, S Birmingham Idarraga, J Montreal AUTHOR|(CDS)2077905 #BEARD# Johns, K Arizona AUTHOR|(CDS)2070655 #BEARD# Kaushik, V Arizona Konoplich, R NYU Kowalewski, RV Victoria Lei, X Arizona AUTHOR|(CDS)2070097 #BEARD# Mann, A Georg-August-Universitaet Goettingen Mermod, P Oxford Mincer, A NYU Morel, J Georg-August-Universitaet Goettingen Nemethy, P NYU Pinder, A Oxford Taylor, RP Victoria Watson, A Birmingham Zhao, L NYU PH-EP http://cds.cern.ch/record/1327653 Original Communication (restricted to ATLAS) http://cds.cern.ch/record/1331180/files/ATL-DAQ-PUB-2011-001.pdf Could not be stamped by WebSubmit: 22/02/2011 diego.casadei@cern.ch n 201170 91 PUBLIC 000712927CER INTNOTEATLASPUBL NOTE