CERN Accelerating science

ATLAS Note
Report number	ATL-PHYS-PROC-2010-135
Title	Measurement of Jet Cross Section and Fragmentation Using Tracks with the ATLAS Detector
Related title	Measurement of Jet Cross Section and Fragmentation of Jets Using Tracks with the ATLAS Detector
Author(s)	Zenz, Seth (UC, Berkeley ; LBL, Berkeley)
Corporate Author(s)	The ATLAS collaboration
Publication	2010
Imprint	02 Dec 2010
Number of pages	3
In:	35th International Conference on High Energy Physics, Paris, France, 22 - 28 Jul 2010, pp.047
DOI	10.22323/1.120.0047
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Track jets ; QCD
Abstract	Jets are identified and their properties studied using tracks measured by the ATLAS Inner Detector. Events are selected using a minimum-bias trigger, allowing the emergence of jets at low transverse momentum to be observed and for jets to be studied independently of the calorimeter. Jets are reconstructed using the anti-kt algorithm applied to tracks with two parameter choices, 0.4 and 0.6. An inclusive jet transverse momentum cross section measurement from 4 GeV to 80 GeV is shown, integrated over |η | < 0.57 and corrected to charged particle-level truth jets. The probability that a particular particle carries a given fraction of the jet momentum (fragmentation function) is also measured. Comparison with the theoretical models implemented in existing tunings of Monte Carlo event generators with the data indicates reasonable overall agreement between data and Monte Carlo; areas where these tunings could be improved are indicated.
Copyright/License	Preprint: (License: CC-BY-4.0)

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