CERN Accelerating science

ATLAS Note
Report number	ATLAS-CONF-2011-046
Title	Muon Momentum Resolution in First Pass Reconstruction of pp Collision Data Recorded by ATLAS in 2010
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2011
Imprint	23 Mar 2011
Number of pages	17
Note	All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2011-046
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS ; muon ; momentum resolution ; Z boson decay to muons ; W boson decay to muon
Abstract	We present a measurement of the muon momentum resolution in the first pass reconstruction of ATLAS pp collision data in 2010, which uses preliminary calibration and alignment constants. The measurement is based on a sample of 41/pb of LHC pp collision data at sqrt(s)=7 TeV collected with muon triggers. The momentum resolution is extracted from the width of the di-muon mass distribution in Z->mu,mu decays and the comparison of the independent measurements of muons from Z->mu,mu and W->mu,nu decays provided by the ATLAS tracking systems, Inner Detector and Muon Spectrometer.
Copyright/License	Preprint: (License: CC-BY-4.0)

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