CERN Accelerating science

ATLAS Note
Report number	ATLAS-CONF-2013-082
Title	Performance of Missing Transverse Momentum Reconstruction in ATLAS studied in Proton-Proton Collisions recorded in 2012 at 8 TeV
Corporate Author(s)	The ATLAS collaboration
Publication	2013
Imprint	09 Aug 2013
Number of pages	43
Note	All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2013-082
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	CERN LHC ; ATLAS
Abstract	The performance of the missing transverse momentum reconstruction in the ATLAS detector is evaluated using data collected in 2012 in proton-proton collisions at a centre-of-mass energy of 8 TeV. An optimised reconstruction and calibration of missing transverse momentum is used and the effects arising from additional proton-proton interactions superimposed on the hard physics process are suppressed with various methods. Results are shown for a data sample corresponding to an integrated luminosity of about 20 fb-1 and for events with different topologies with or without a genuine missing transverse momentum due to undetected particles. Estimates of the systematic uncertainty on the missing transverse momentum measurement are also presented.
Copyright/License	Preprint: (License: CC-BY-4.0)

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