Performance of Particle Identification with the ATLAS Transition Radiation Tracker

Hines, E.

ATLAS Note
Report number	arXiv:1109.5925
Title	Performance of Particle Identification with the ATLAS Transition Radiation Tracker
Author(s)	Hines, E.
Collaboration	for the ATLAS collaboration
Publication	2011
Imprint	26 Sep 2011
Number of pages	8
Note	Comments: 8 pages, 7 figures. Conference proceedings for the Meeting of the Division of Particles and Fields of the American Physical Society (DPF), 2011 8 pages, 7 figures. Conference proceedings for the Meeting of the Division of Particles and Fields of the American Physical Society (DPF), 2011
In:	Meeting of the Division of Particles and Fields of the American Physical Society, Providence, Rhode Island, USA, 9 - 13 Aug 2011
Subject category	Detectors and Experimental Techniques ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Abstract	The ATLAS Transition Radiation Tracker (TRT) is the outermost of the three sub-systems of the ATLAS Inner Detector at the Large Hadron Collider at CERN. In addition to its tracking capabilities, the TRT provides particle identification (PID) ability through the detection of transition radiation X-ray photons. The latter functionality provides substantial discriminating power between electrons and hadrons in the momentum range from 1 to 200 GeV. In addition, the measurement of an enhancement of signal time length, which is related to high specific energy deposition (dE/dx), can be used to identify highly ionizing particles, increasing the electron identification capabilities at low momentum and improving the sensitivity of searches for new physics. This talk presents the commissioning of TRT PID during early 2010 7 TeV data taking. Performance in 2010 and 2011 demonstrating the TRT's ability to identify electrons, complementary to calorimeter based identification methods, will also be shown.
Copyright/License	Preprint: (License: CC-BY-4.0)